U.S. patent application number 15/008422 was filed with the patent office on 2017-07-27 for mixed environment display device and waveguide cross-coupling suppressors.
The applicant listed for this patent is Yijing Fu, Mingwei Hsu, Gangok Lee, Angus Wu. Invention is credited to Yijing Fu, Mingwei Hsu, Gangok Lee, Angus Wu.
Application Number | 20170212348 15/008422 |
Document ID | / |
Family ID | 57956390 |
Filed Date | 2017-07-27 |
United States Patent
Application |
20170212348 |
Kind Code |
A1 |
Fu; Yijing ; et al. |
July 27, 2017 |
MIXED ENVIRONMENT DISPLAY DEVICE AND WAVEGUIDE CROSS-COUPLING
SUPPRESSORS
Abstract
An optical device comprises a number of waveguides, e.g., color
plates, that are individually formed to couple a corresponding
color output of a micro-display engine and project an image into a
human vision system. Some configurations include stacked structures
for suppressing a predetermined wavelength range a corresponding to
a wavelength range emitted from a waveguide. Techniques, devices,
and systems disclosed herein can mitigate cross coupling that
occurs between the waveguides to provide enhanced MTF values over
devices that do not include the stacked structures. Individual
optical devices configured to suppress a predetermined wavelength
range are also provided.
Inventors: |
Fu; Yijing; (Redmond,
WA) ; Wu; Angus; (Bellevue, WA) ; Lee;
Gangok; (Bellevue, WA) ; Hsu; Mingwei;
(Lynnwood, WA) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Fu; Yijing
Wu; Angus
Lee; Gangok
Hsu; Mingwei |
Redmond
Bellevue
Bellevue
Lynnwood |
WA
WA
WA
WA |
US
US
US
US |
|
|
Family ID: |
57956390 |
Appl. No.: |
15/008422 |
Filed: |
January 27, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G02B 5/3083 20130101;
G02B 6/0076 20130101; G02B 27/0172 20130101; G02B 2027/0118
20130101; G02B 5/20 20130101; G02B 1/11 20130101; G02B 2027/0112
20130101; G02B 2027/0141 20130101; G02B 6/02052 20130101 |
International
Class: |
G02B 27/01 20060101
G02B027/01; G02B 5/20 20060101 G02B005/20; G02B 1/11 20060101
G02B001/11; G02B 6/02 20060101 G02B006/02; G02B 5/30 20060101
G02B005/30 |
Claims
1. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
first stacked structure for receiving the input light from the
first pass-through region, the first stacked structure suppressing
the first predetermined wavelength range from the input light to
emit a first filtered light, wherein suppressing the first
predetermined wavelength range includes absorbing and reflecting
light within the first predetermined wavelength range; a second
waveguiade having a second input region for receiving the first
filtered light into the second waveguide and a second output region
for emitting a second output light from the second waveguide, the
second waveguide reflecting a second predetermined wavelength range
of the first filtered light within the second waveguide towards the
second output region, the second waveguide having a second
pass-through region for emitting the first filtered light; a second
stacked structure for receiving the first filtered light from the
second pass-through region, the second stacked structure configured
suppressing the second predetermined wavelength range from the
first filtered light to emit a second filtered light, wherein
suppressing the second predetermined wavelength range includes
absorbing and reflecting light within the second predetermined
wavelength range; and a third waveguide having a third input region
for receiving the second filtered light into the third waveguide
and a third output region for emitting a third output light from
the third waveguide, the third waveguide reflecting a third
predetermined wavelength range of the second filtered light within
the third waveguide towards the third output region.
2. The optical device of claim 1, wherein the first output region,
second output region, the third output region, and a lens emitting
light of a field-of-view are aligned to emit a combined output
light that includes the first output light, second output light,
the third output light, and the light of the field-of-view.
3. The optical device of claim 1, wherein the first predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
4. The optical device of claim 1, wherein the second predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
5. The optical device of claim 1, wherein the third predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
6. The optical device of claim 1, wherein the first stacked
structure comprises: an input pigmentation layer for absorbing
light within the first predetermined wavelength range; an output
antireflective film; and a retardation film between the output
antireflective film and the input pigmentation layer, wherein the
retardation film is configured to provide a predetermined
retardation value.
7. The optical device of claim 6, wherein the predetermined
retardation value is within a threshold level of 270 degrees or 90
degrees.
8. The optical device of claim 1, wherein the second stacked
structure comprises: an input pigmentation layer for absorbing
light within the second predetermined wavelength range; an output
antireflective film; and a retardation film between the output
antireflective film and the input pigmentation layer, wherein the
retardation film is configured to provide a predetermined
retardation value.
9. The optical device of claim 8, wherein the predetermined
retardation value is within a threshold level of 270 degrees or 90
degrees.
10. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
first stacked structure for receiving the input light from the
first pass-through region, the first stacked structure including a
first bandpass filter layer substantially filtering light at
wavelengths below a second predetermined wavelength and above a
third predetermined wavelength to emit a first filtered light; a
second waveguide having a second input region for receiving the
first filtered light into the second waveguide and a second output
region for emitting a second output light from the second
waveguide, the second waveguide reflecting the second predetermined
wavelength range of the first filtered light within the second
waveguide towards the second output region, the second waveguide
having a second pass-through region for emitting the first filtered
light; a second stacked structure for receiving the first filtered
light from the second pass-through region, the second stacked
structure including a second bandpass filter layer substantially
filtering light at wavelengths above and below the third
predetermined wavelength range to emit a second filtered light; and
a third waveguide having a third input region for receiving the
second filtered light into the third waveguide and a third output
region for emitting a third output light from the third waveguide,
the third waveguide reflecting the third predetermined wavelength
range of the second filtered light within the third waveguide
towards the third output region.
11. The optical device of claim 10, wherein the first output
region, second output region, the third output region, and a lens
emitting light of a field-of-view are aligned to emit a combined
output light that includes the first output light, second output
light, the third output light, and the light of the
field-of-view.
12. The optical device of claim 10, wherein the first predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
13. The optical device of claim 10, wherein the second
predetermined wavelength range comprises a first range including
460 nm, a second range including 525 nm, or a third range including
617 nm.
14. The optical device of claim 10, wherein the third predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
15. The optical device of claim 10, wherein the first stacked
structure comprises: an input antireflective layer; a first
selective wavelength retardation film adjacent to the first
antireflective layer, the wavelength retardation film providing a
predetermined retardation value; a second selective wavelength
retardation film, the second selective wavelength retardation film
providing the predetermined retardation value, the first bandpass
filter layer positioned between the first selective wavelength
retardation film and the second selective wavelength retardation
film; and an output antireflective film adjacent to the second
selective wavelength retardation film.
16. The optical device of claim 15, the first bandpass filter layer
substantially filtering light at wavelengths at least 10 nm above
and at least 10 nm below the second predetermined wavelength.
17. The optical device of claim 15, wherein the predetermined
retardation value is 45 degrees.
18. The optical device of claim 15, wherein the second stacked
structure comprises: an input antireflective layer; a first
selective wavelength retardation film adjacent to the first
antireflective layer, the wavelength retardation film providing a
predetermined retardation value; a second selective wavelength
retardation film, the second selective wavelength retardation film
providing the predetermined retardation value, the second bandpass
filter layer positioned between the first selective wavelength
retardation film and the second selective wavelength retardation
film; and an output antireflective film adjacent to the second
selective wavelength retardation film.
19. The optical device of claim 18, the second bandpass filter
layer substantially filtering light at wavelengths at least 10 nm
above and at least 10 nm below the third predetermined
wavelength.
20. The optical device of claim 17, wherein the predetermined
retardation value is 45 degrees.
21. (canceled)
22. (canceled)
23. (canceled)
24. (canceled)
25. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
first stacked structure for receiving the input light from the
first pass-through region, the first stacked structure including a
bandpass filter layer substantially filtering light at wavelengths
below a second predetermined wavelength range and light at
wavelengths above a third predetermined wavelength range to emit a
first filtered light; a second waveguide having a second input
region for receiving the first filtered light into the second
waveguide and a second output region for emitting a second output
light from the second waveguide, the second waveguide reflecting
the second predetermined wavelength range of the first filtered
light within the second waveguide towards the second output region,
the second waveguide having a second pass-through region for
emitting the first filtered light; a second stacked structure for
receiving the first filtered light from the second pass-through
region, the second stacked structure configured suppressing the
second predetermined wavelength range from the first filtered light
to emit a second filtered light; and a third waveguide having a
third input region for receiving the second filtered light into the
third waveguide and a third output region for emitting a third
output light from the third waveguide, the third waveguide
reflecting the third predetermined wavelength range of the second
filtered light within the third waveguide towards the third output
region.
26. The optical device of claim 25, wherein the first stacked
structure comprises: an input antireflective layer; a first
selective wavelength retardation film adjacent to the first
antireflective layer, the wavelength retardation film providing a
predetermined retardation value; a second selective wavelength
retardation film, the second selective wavelength retardation film
providing the predetermined retardation value, the bandpass filter
layer positioned between the first selective wavelength retardation
film and the second selective wavelength retardation film; and an
output antireflective film adjacent to the second selective
wavelength retardation film.
27. The optical device of claim 26, the second bandpass filter
layer substantially filtering light at wavelengths at least 10 nm
above and at least 10 nm below the second predetermined
wavelength.
28. The optical device of claim 26, wherein the predetermined
retardation value is within a threshold of 45 degrees.
29. The optical device of claim 25, wherein the second stacked
structure comprises: an input pigmentation layer for absorbing
light within the second predetermined wavelength range; an output
antireflective film; and a retardation film between the output
antireflective film and the input pigmentation layer, wherein the
retardation film is configured to provide a predetermined
retardation value.
30. The optical device of claim 29, wherein the predetermined
retardation value is within a threshold level of 270 degrees or 90
degrees.
31. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
first stacked structure for receiving the input light from the
first pass-through region, the first stacked structure suppressing
the first predetermined wavelength range from the input light to
emit a first filtered light; a second waveguide having a second
input region for receiving the first filtered light into the second
waveguide and a second output region for emitting a second output
light from the second waveguide, the second waveguide reflecting
the second predetermined wavelength range of the first filtered
light within the second waveguide towards the second output region,
the second waveguide having a second pass-through region for
emitting the first filtered light; a second stacked structure for
receiving the first filtered light from the second pass-through
region, the second stacked structure including a second bandpass
filter layer substantially filtering light at wavelengths above and
below a third predetermined wavelength range to emit a second
filtered light; and a third waveguide having a third input region
for receiving the second filtered light into the third waveguide
and a third output region for emitting a third output light from
the third waveguide, the third waveguide reflecting the third
predetermined wavelength range of the second filtered light within
the third waveguide towards the third output region.
32. The optical device of claim 31, wherein the first stacked
structure comprises: an input pigmentation layer for absorbing
light within the first predetermined wavelength range; an output
antireflective film; and a retardation film between the output
antireflective film and the input pigmentation layer, wherein the
retardation film is configured to provide a predetermined
retardation value.
33. The optical device of claim 32, wherein the predetermined
retardation value is 270 degrees or 90 degrees.
34. The optical device of claim 31, wherein the second stacked
structure comprises: an input antireflective layer; a first
selective wavelength retardation film adjacent to the first
antireflective layer, the wavelength retardation film providing a
predetermined retardation value; a second selective wavelength
retardation film, the second selective wavelength retardation film
providing the predetermined retardation value, the second bandpass
filter layer positioned between the first selective wavelength
retardation film and the second selective wavelength retardation
film; and an output antireflective film adjacent to the second
selective wavelength retardation film.
35. The optical device of claim 34, the second bandpass filter
layer substantially filtering light at wavelengths at least 10 nm
above and at least 10 nm below the third predetermined
wavelength.
36. The optical device of claim 34, wherein the predetermined
retardation value is 45 degrees.
37. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
stacked structure for receiving the input light from the first
pass-through region, the stacked structure suppressing the first
predetermined wavelength range from the input light to emit a
filtered light, wherein suppressing the first predetermined
wavelength range includes absorbing and reflecting light within the
first predetermined wavelength range; a second waveguide having a
second input region for receiving the filtered light into the
second waveguide and a second output region for emitting a second
output light from the second waveguide, the second waveguide
reflecting a second predetermined wavelength range of the filtered
light within the second waveguide towards the second output region,
the second waveguide having a second pass-through region for
emitting the filtered light; and a third waveguide having a third
input region for receiving the filtered light into the third
waveguide and a third output region for emitting a third output
light from the third waveguide, the third waveguide reflecting a
third predetermined wavelength range of the filtered light within
the third waveguide towards the third output region.
38. The optical device of claim 37, wherein the first output
region, second output region, the third output region, and a lens
emitting light of a field-of-view are aligned to emit a combined
output light that includes the first output light, second output
light, the third output light, and the light of the
field-of-view.
39. The optical device of claim 37, wherein the first predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
40. The optical device of claim 37, wherein the second
predetermined wavelength range comprises a first range including
460 nm, a second range including 525 nm, or a third range including
617 nm.
41. The optical device of claim 37, wherein the third predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
42. The optical device of claim 37, wherein the stacked structure
comprises: an input pigmentation layer for absorbing light within
the first predetermined wavelength range; an output antireflective
film; and a retardation film between the output antireflective film
and the input pigmentation layer, wherein the retardation film is
configured to provide a predetermined retardation value.
43. The optical device of claim 42, wherein the predetermined
retardation value is within a threshold level of 270 degrees or 90
degrees.
44. An optical device, comprising: a first waveguide having a first
input region for receiving input light into the first waveguide and
a first output region for emitting a first output light from the
first waveguide, the first waveguide reflecting a first
predetermined wavelength range of the input light within the first
waveguide towards the first output region, the first waveguide
having a first pass-through region for emitting the input light; a
second waveguide having a second input region for receiving the
input light into the second waveguide and a second output region
for emitting a second output light from the second waveguide, the
second waveguide reflecting a second predetermined wavelength range
of the input light within the second waveguide towards the second
output region, the second waveguide having a second pass-through
region for emitting the input light; a stacked structure for
receiving the input light from the second pass-through region, the
stacked structure configured suppressing the second predetermined
wavelength range from the input light input light to emit a
filtered light, wherein suppressing the second predetermined
wavelength range includes absorbing and reflecting light within the
second predetermined wavelength range; and a third waveguide having
a third input region for receiving the filtered light into the
third waveguide and a third output region for emitting a third
output light from the third waveguide, the third waveguide
reflecting a third predetermined wavelength range of the filtered
light within the third waveguide towards the third output
region.
45. The optical device of claim 44, wherein the first output
region, second output region, the third output region, and a lens
emitting light of a field-of-view are aligned to emit a combined
output light that includes the first output light, second output
light, the third output light, and the light of the
field-of-view.
46. The optical device of claim 45, wherein the first predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
47. The optical device of claim 45, wherein the second
predetermined wavelength range comprises a first range including
460 nm, a second range including 525 nm, or a third range including
617 nm.
48. The optical device of claim 45, wherein the third predetermined
wavelength range comprises a first range including 460 nm, a second
range including 525 nm, or a third range including 617 nm.
49. The optical device of claim 45, wherein the stacked structure
comprises: an input pigmentation layer for absorbing light within
the second predetermined wavelength range; an output antireflective
film; and a retardation film between the output antireflective film
and the input pigmentation layer, wherein the retardation film is
configured to provide a predetermined retardation value.
50. The optical device of claim 49, wherein the predetermined
retardation value is within a threshold level of 270 degrees or
Description
BACKGROUND
[0001] Some devices include waveguides for providing near-to-eye
display capabilities. For example, a head mounted display ("HMD")
can include a number of waveguides to provide a single-eye display
or a dual-eye display to a user. Some devices are designed to
provide a computer generated image ("CGI") to a user, while other
devices are designed to provide a mixed environment display, which
includes superimposing a CGI over a real-world view. Thus, a user
can see a real-world view of objects in their surrounding
environment along with a CGI, a feature that is sometimes referred
to as an "augmented reality display" because a user's view of the
world can be augmented with a CGI. Although such devices are
becoming more commonplace, developments to improve the sharpness of
displayed images will continue to be a priority.
[0002] The disclosure made herein is presented with respect to
these and other considerations. It is with respect to these and
other considerations that the disclosure made herein is
presented.
SUMMARY
[0003] Technologies described herein provide an enhanced mixed
environment display device and waveguide cross-coupling
suppressors. In some configurations, a device comprises a number of
waveguides, e.g., color plates, that are individually formed to
couple a corresponding color output of a micro-display engine and
project an image into a human vision system. Some configurations
include stacked structures for suppressing a predetermined
wavelength range corresponding to a wavelength range emitted from a
waveguide. Techniques, devices, and systems disclosed herein can
mitigate cross coupling that occurs between the waveguides to
provide enhanced modulation transfer function (MTF) values over
devices that do not include the stacked structures.
[0004] It should be appreciated that the above-described subject
matter may also be implemented as part of a computer-controlled
apparatus, a computing system, part of an article of manufacture,
or a process for making the same. These and various other features
will be apparent from a reading of the following Detailed
Description and a review of the associated drawings.
[0005] This Summary is provided to introduce a selection of
concepts in a simplified form that are further described below in
the Detailed Description. This Summary is not intended to identify
key features or essential features of the claimed subject matter,
nor is it intended that this Summary be used to limit the scope of
the claimed subject matter. Furthermore, the claimed subject matter
is not limited to implementations that solve any or all
disadvantages noted in any part of this disclosure.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] FIG. 1 illustrates an example optical device including a
number of waveguides;
[0007] FIG. 2 illustrates an example optical device including a
number of waveguides and a number of stacked structures for
suppressing cross coupling between the waveguides;
[0008] FIGS. 3A and 3B respectively illustrate a side view and a
perspective view of a three-layer stacked structure that can be
used for suppressing cross coupling between the waveguides; and
[0009] FIGS. 4A and 4B respectively illustrate a side view and a
perspective view of a five-layer stacked structure that can be used
for suppressing cross coupling between the waveguides.
DETAILED DESCRIPTION
[0010] With reference to FIG. 1, an optical device 100 includes a
first waveguide 102A, a second waveguide 102B, and a third
waveguide 102C, which are individually and collectively referred to
herein as a "waveguide 102" or a "grating structure 102." In some
configurations, the first waveguide 102A includes a first input
region 103A for receiving input light 150 into the first waveguide
102A and a first output region 105A for emitting a first output
light from the first waveguide 102A. The first waveguide 102A is
formed to reflect a first predetermined wavelength range of the
input light within the first waveguide 102A towards the first
output region 105A. The first waveguide 102A also comprises a first
pass-through region 104A for emitting the input light 150.
[0011] The second waveguide 102B has a second input region 103B for
receiving the input light 150 into the second waveguide 102B from
the first pass-through region 104A. The second waveguide 102B has a
second output region 105B for emitting a second output light. The
second waveguide 102B is formed to reflect a second predetermined
wavelength range of the input light 150 within the second waveguide
102B towards the second output region 105B. The second waveguide
102B also has a second pass-through region 104B for emitting the
input light 150.
[0012] The third waveguide 102C has a third input region 103C for
receiving the input light 150 into the third waveguide 102C from
the second pass-through region 104B. The third waveguide 102C has a
third output region 105C for emitting a third output light. The
third waveguide 102C is formed to reflect a third predetermined
wavelength range of the input light 150 within the third waveguide
102C towards the third output region 105C.
[0013] The input regions 103 of each waveguide 102 can include
coupling mirror structures that are orientated to reflect the input
light 150 through the pass-through regions 104. The coupling mirror
structures can also reflect a select wavelength range of the input
light 150 towards the output region 105. It can be appreciated that
each waveguide 102 can also have other coupling mirror structures
for achieving the results described herein, including a coupling
mirror structure opposite of the output region 105.
[0014] The first predetermined wavelength range, second
predetermined wavelength range, and the third predetermined
wavelength range can individually include a first range including
460 nm (blue), a second range including 525 nm (green), or a third
range including 617 nm (red). It can be appreciated that the ranges
can be in any order. For example, the order of the waveguides
configured for each wavelength range can be: RGB, GBR, BRG, RBG,
GRB, BGR, etc.
[0015] The optical device 100 is configured to enable a user to
simultaneously view objects from different environments. In some
configurations, the optical device 100 can display a CGI 120, e.g.,
a rendering of an object 110. The CGI 120 can be emitted into the
optical device 100 by the use of a micro-display engine or other
like device. In addition, some configurations of the optical device
100 can allow a user to see through sections of the optical device
100, enabling the user to view real-world objects in his or her
surrounding environment. In the example of FIG. 1, light 151 from a
sample real-world view 121 includes a view of a first real-world
object 111A and a second real-world object 111B, which are
collectively and individually referred to herein as "real-world
objects 111." For illustrative purposes, a user's perspective
looking at real-world objects 111 through the optical device 100 is
referred to herein as a "real-world view of a real-world object" or
a "real-world view of a physical object." The optical device 100
aligns the output light of the output regions 105 to enable an
output view 130, where the CGI 120 is superimposed over the
real-world view 121. For illustrative purposes, the output view 130
is referred to as a "mixed environment" display.
[0016] Due to the fact that the grating diffraction efficiency
spectrum of each color plate 102 can be wide, light can couple into
the wrong color plate even at a crossed polarization angle. For a
number of reasons, including the existence of substrate wedge angle
variation and grating dispersion, the output angle of a single
color light from the wrong color plate can be different from the
single color light from the correct color plate. This phenomenon
leads to a spread out in the angular space for the output light,
which in turn leads to a number of issues, including a MTF drop for
one or more colors. A graphical representation of such issues is
shown with the dashed lines in FIG. 1. As shown by the dashed
lines, light of a first color can emit from the first plate 102A of
the first color into the second plate 102B of a second color.
Similarly, light of the second color can emit from the second plate
102B to a third plate 102C of a third color. Techniques and
configurations, such as the optical device 200 of FIG. 2, utilize
stacked structures for suppressing the optical phenomenon described
above.
[0017] With reference to FIG. 2, an optical device 200 includes a
first waveguide 102A, a second waveguide 102B, and a third
waveguide 102C. The optical device 200 also includes a first
stacked structure 101A positioned between the first waveguide 102A
and the second waveguide 102B, and a second stacked structure 101B
positioned between the second waveguide 102B and the third
waveguide 102C.
[0018] In some configurations, the first waveguide 102A includes a
first input region 103A for receiving input light 150 into the
first waveguide 102A and a first output region 105A for emitting a
first output light 155 from the first waveguide 102A. The first
waveguide is formed to reflect a first predetermined wavelength
range of the input light within the first waveguide towards the
first output region 105A causing the first output light 155. The
first waveguide 102A also has a first pass-through region 104A for
emitting the input light 150.
[0019] The first stacked structure 101A receives the input light
150 from the first pass-through region 104A. The first stacked
structure 101A is configured to suppress the first predetermined
wavelength range from the input light 150 to emit a first filtered
light 152 having a suppressed level of light within the first
predetermined wavelength range.
[0020] The second waveguide 102B has a second input region 103B for
receiving the first filtered light 152 into the second waveguide
102B. The second waveguide 102B has a second output region 105B for
emitting a second output light 156. The second waveguide 102B is
formed to reflect a second predetermined wavelength range of the
first filtered light 152 within the second waveguide 102B towards
the second output region 105B causing the second output light 156.
The second waveguide 102B also includes a second pass-through
region 104B for emitting the first filtered light 152.
[0021] The second stacked structure 101B receives the first
filtered light 152 from the first pass-through region 104A. The
second stacked structure 101B is configured to suppress the second
predetermined wavelength range from the first filtered light 152 to
emit a second filtered light 153 having a suppressed level of light
within the second predetermined wavelength range.
[0022] The third waveguide 102C has a third input region 103C for
receiving the second filtered light 153 into the third waveguide
102C from the second pass-through region 104B. The third waveguide
102C has a third output region 105C for emitting a third output
light 157. The third waveguide 102C is formed to reflect a third
predetermined wavelength range of the second filtered light 153
within the third waveguide 102C towards the third output region
105C causing the third output light 157.
[0023] Similar to the optical device 100, the optical device 200 is
configured to enable a user to simultaneously view objects from
different environments. In some configurations, the optical device
200 can display a CGI 120. The CGI 120 can be emitted into the
optical device 200 by the use of a micro-display engine or other
like device. In addition, some configurations of the optical device
100 can allow a user to see through sections of the optical device
100, enabling the user to view real-world objects in his or her
surrounding environment. The optical device 200 aligns the output
light (155-157) of the output regions 105 and the light 151 from
the surrounding environment to enable a mixed environment
display.
[0024] As summarized above, the waveguides 102 serve the function
to couple a particular color output from a display engine, such as
a micro-display engine and project light into a human vision system
201. The stacked structures 101 can include a wide-band 1/2 plate
between the waveguides 102 to convert the polarization state of the
single color light to (1) the optimum in-coupling polarization
angle at a corresponding waveguide and to (2) the crossed
polarization angle at the wrong waveguide to reduce single color
light coupling into the wrong color plate. Such a result, e.g.,
stacked structures 101 blocking a single color light from entering
a wrong waveguide 102, is represented by the dashed lines. The
resulting light has improved sharpness quality and a high MTF
value.
[0025] Referring now to FIGS. 3A and 3B, aspects of a stacked
structure 101 are shown and described below. The stacked structure
101 shown in FIGS. 3A and 3B can be the first stacked structure
101A and/or the second stacked structure 101B. As shown, the
stacked structure 101 can include an input pigmentation layer 301
for suppressing light within a predetermined wavelength range. The
light can be suppressed by absorbing and reflecting light within a
predetermined wavelength range.
[0026] Any material suitable for absorbing and/or reflecting light
within a predetermined wavelength range can be utilized. For
example, a synthetic dye or an organic dye can be used in the
pigmentation layer 301. In some configurations, the pigmentation
layer 301 can include any suitable dichromatic substance for
absorbing and/or reflecting light within a predetermined wavelength
range. Examples of dichromatic substances include some seed oils,
bromophenol blue and resazurin. The predetermined wavelength range
is dependent on both the concentration of the suppressing substance
and the depth or thickness of the medium that is traversed.
[0027] In some configuration, the pigmentation layer 301 absorbs
light and reflects light at the same time. In some configurations,
the dye can be configured to suppress blue, green, or red light.
For example, if the stacked structure 101 is to suppress a blue
light, the pigmentation layer 301 can absorb light within the range
of 450 nm and 470 nm. If the stacked structure 101 is to suppress a
green light, the pigmentation layer 301 can absorb light within the
range of 515 nm and 535 nm. If the stacked structure 101 is to
suppress a red light, the pigmentation layer 301 can absorb light
within the range of 607 nm and 627 nm.
[0028] The stacked structure 101 can also include an output
antireflective film 303 and a retardation film 302 between the
output antireflective film 303 and the input pigmentation layer
301. The retardation film 302 is configured to provide a
predetermined retardation value. In some configurations,
retardation film 302 is configured to provide a predetermined
retardation value that includes 270 degrees or 90 degrees. For
illustrative purposes, the retardation film 302 is also referred to
as a polarization film. The designs disclosed herein can include a
retardation value within a threshold of 270 degrees or within the
threshold of 90 degrees. For example, the threshold can be one,
two, or three degrees.
[0029] Referring now to FIGS. 4A and 4B, aspects of another
configuration of a stacked structure 101' are shown and described
below. The stacked structure 101' shown in FIGS. 4A and 4B can be
the first stacked structure 101A and/or the second stacked
structure 101B. As shown, the stacked structure 101' can include an
input antireflective film 401. The stacked structure 101' can also
include a first retardation film 402 adjacent to the antireflective
film 401. The first retardation film 402 can be configured to
provide a predetermined retardation value. In some configurations,
first retardation film is 402 is configured to provide a
predetermined retardation value that includes 45 degrees. The
designs of the stacked structure 101' can include retardation film
with a retardation value of 45 degrees, an equivalent of 45
degrees, or a value within a threshold of 45 degrees.
[0030] The stacked structure 101' also includes a bandpass filter
layer 403 adjacent to the first retardation film is 402. The
bandpass filter layer 403 substantially filters light at
wavelengths below a first predetermined level and above a second
predetermined level. For example, if the stacked structure 101' is
to allow the passage of a blue light, the first predetermined level
and the second predetermined level can be 450 and 470,
respectively. If the stacked structure 101' is to allow the passage
of a green light, the first predetermined level and the second
predetermined level can be 515 and 535, respectively. If the
stacked structure 101' is to allow the passage of a red light, the
first predetermined level and the second predetermined level can be
607 and 627, respectively. Among other examples, the stacked
structure 101' can be configured to allow the passage of a green
light and a red light. In such a configuration, the first
predetermined level and the second predetermined level can be 515
and 627, respectively. In yet another example, the stacked
structure 101' can be configured to allow the passage of a blue
light and a green light. In such a configuration, the first
predetermined level and the second predetermined level can be 450
and 535, respectively.
[0031] In some configurations, the bandpass filter layer 403 can
comprise a synthetic dye or an organic dye. It can be appreciated
that any suitable material can be used to filter light at
wavelengths below a first predetermined level and above a second
predetermined. level. In some configurations, the bandpass filter
layer 403 can include any suitable dichromatic substance for
filtering light at wavelengths below a first predetermined level
and above a second predetermined level. Examples of dichromatic
substances include some seed oils, bromophenol blue and
resazurin.
[0032] In one illustrative example, with reference to FIG. 2,
consider a design where the first waveguide 102A, second waveguide
102B, and third waveguide 102C respectively emit a blue light, a
green light, and a red light. In such a configuration, the bandpass
filter layer 403 of the first stacked structure 101A can filter
light at wavelengths below 470 nm and filter light at wavelengths
above 627 nm. These ranges are provided for illustrative purposes,
any suitable values can be used to enable the first stacked
structure 101A to substantially inhibit the passage of blue light,
and allow the passage of green and red light. Other ranges for the
bandpass filter layer 403 of the first stacked structure 101A can
be used. For example, the bandpass filter layer 403 of the first
stacked structure 101A can filter light at wavelengths below 515 nm
and fitter light at wavelengths above 627 nm.
[0033] in the current example, the bandpass filter layer 403 of the
second stacked structure 101B can filter light at wavelengths below
607 nm and filter light at wavelengths above 627 nm. Thus, the
second stacked structure 101B in this example allows the passage of
red light and inhibits the passage of green and blue light. These
ranges are provided for illustrative purposes, any suitable values
can be used to enable the second stacked structure 101B to
substantially inhibit green and blue light and allow the passage of
red light.
[0034] These examples are provided for illustrative purposes and is
not to be construed as limiting. It can be appreciated that the
waveguides 102 can be in any other suitable order, including RGB,
RBG, BGR, BRG. In addition, the stacked structures 101 can be
arranged to allow the passage of one or more colors, which may
include colors associated with the waveguides 102 succeeding the
stacked structures 101 in a light path. The bandpass filter layer
403 can be configured with different parameters depending on the
desired result. For instance, if a target wavelength of a waveguide
is 617 nm. the bandpass filter can allow the passage of light
within a threshold, e.g., 1 nm to 10 nm, of the target wavelength.
For example, the bandpass filter layer 403 can filter light at
wavelengths below 524 nm and filter light at wavelengths above 526
nm when a succeeding waveguide is configured to emit green light.
In another example, the bandpass filter layer 403 can filter light
at wavelengths below 459 nm and filter light at wavelengths above
461 nm when a succeeding waveguide is configured to emit blue
light. In yet another example, the bandpass filter layer 403 can
filter light at wavelengths below 616 nm and filter light at
wavelengths above 618 nm when a succeeding waveguide is configured
to emit red light. Other ranges can be used with the configurations
disclosed herein.
[0035] The stacked structure 101' also includes a second
retardation film 404 adjacent to the bandpass filter layer 403. The
second retardation film 404 can be configured to provide a
predetermined retardation value. In some configurations, second
retardation film 404 is configured to provide a predetermined
retardation value that includes 45 degrees or an equivalent to 45
degrees. The second retardation film 404, and the other retardation
layers disclosed herein, can be manufactured by diagonally stretch
or machine directional stretch process. The stacked structure 101'
also includes an output antireflective film 405 adjacent to the
second retardation film 404. As with other antireflective films
disclosed herein, the output antireflective film 405 can include
coatings, such as broadband antireflection coatings, that can be
applied using vacuum coating, wet coating, or any other suitable
method. Antiglare coatings also may be applied in order to reduce
unwanted specular reflection.
[0036] Based on the foregoing, it should be appreciated that
concepts and technologies have been disclosed herein that provide
formable interface and shielding structures. Although the subject
matter presented herein has been described in language specific to
some structural features, methodological and transformative acts,
and specific machinery, it is to be understood that the invention
defined in the appended claims is not necessarily limited to the
specific features or acts described herein. Rather, the specific
features and acts are disclosed as example forms of implementing
the claims.
[0037] The subject matter described above is provided by way of
illustration only and should not be construed as limiting. Various
modifications and changes may be made to the subject matter
described herein without following the example configurations and
applications illustrated and described, and without departing from
the true spirit and scope of the present invention, which is set
forth in the following claims.
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