Input coupling
First Claim
1. An optical device comprising:
- a total internal reflection (TIR) waveguide having a first substrate with opposing first and second surfaces and having a second substrate with opposing first and second surfaces; and
a grating medium in the TIR waveguide and interposed between the second surface of the first substrate and the first surface of the second substrate, wherein the grating medium comprises an output coupling device configured to couple light out of the TIR waveguide, wherein the output coupling device comprises at least one diffractive grating, and wherein the first substrate comprises an input coupling face that extends at a non-perpendicular angle from the first surface of the first substrate to the second surface of the first substrate, the input coupling face being configured to couple, via transmission, image light into the TIR waveguide.
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Accused Products
Abstract
An optical device including a first layer of a total internal reflection (TIR) waveguide and a second layer of the TIR waveguide is disclosed. The second layer of the TIR waveguide may be coupled to the first layer. The second layer may include an output coupling device configured to reflect light toward an exit face of the TIR waveguide. The output coupling device may include one or more diffractive gratings. The optical device may also include an input coupling face disposed on a non-diffractive edge portion the first layer or the second layer or both the first and second layer. The input coupling face may be configured to receive image light. Another optical device may include an input coupling face disposed on a non-diffractive input coupling element. The non-diffractive input coupling element may be positioned in an optical path for directing the image light to the TIR waveguide.
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Citations
24 Claims
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1. An optical device comprising:
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a total internal reflection (TIR) waveguide having a first substrate with opposing first and second surfaces and having a second substrate with opposing first and second surfaces; and a grating medium in the TIR waveguide and interposed between the second surface of the first substrate and the first surface of the second substrate, wherein the grating medium comprises an output coupling device configured to couple light out of the TIR waveguide, wherein the output coupling device comprises at least one diffractive grating, and wherein the first substrate comprises an input coupling face that extends at a non-perpendicular angle from the first surface of the first substrate to the second surface of the first substrate, the input coupling face being configured to couple, via transmission, image light into the TIR waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An optical device comprising:
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a first layer of a total internal reflection (TIR) waveguide, the first layer having opposing first and second planar surfaces; and a second layer of the TIR waveguide having opposing first and second planar surfaces, wherein the second planar surface of the first layer is layered onto the first planar surface of the second layer, the second layer comprises an output coupling device configured to couple light out of the TIR waveguide, the output coupling device comprising at least one diffractive grating, the second layer comprises an input coupling face that extends at a non-perpendicular angle from the first planar surface of the second layer to the second planar surface of the second layer, and the input coupling face is configured to couple, via transmission, image light into the TIR waveguide. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An optical device comprising:
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a first layer of a total internal reflection (TIR) waveguide, the first layer having opposing first and second planar surfaces and an edge face that extends at a non-perpendicular angle between the first and second planar surfaces of the first layer; a second layer of the TIR waveguide, the second layer having opposing first and second planar surfaces, the first planar surface of the second layer being coupled to the second planar surface of the first layer, and the second layer comprising; an output coupling device configured to couple image light out of the TIR waveguide, the output coupling device comprising at least one diffractive grating; and a prism having opposing first and second planar surfaces, the second planar surface of the prism being directly mounted to the first planar surface of the first layer, wherein the prism comprises an input coupling face that extends from the first planar surface of the prism to the second planar surface of the prism, the input coupling face extends parallel to and is aligned with the edge face of the first layer, and the input coupling face is configured to couple, via transmission, the image light into the TIR waveguide. - View Dependent Claims (23, 24)
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Specification