Birefringent ocular for augmented reality imaging
First Claim
Patent Images
1. A display apparatus comprising:
- a) a birefringent compound lens having a first optical power for light having a first polarized axis and a second optical power for light having a second polarization axis that is orthogonal to the first polarization axis, wherein the first optical power ranges between 14.3 and 50 diopters and the second optical power is less than 1 diopter and wherein the birefringent compound lens serves as an ocular and provides an eye box for a viewer;
b) an image source that emits image-bearing light having the first polarization axis;
andc) a polarization beam splitter disposed to reflect the image-bearing light of the first polarization axis toward the birefringent compound lens and further disposed to transmit, from an object scene, light having the second polarization axis.
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Abstract
A display apparatus has a birefringent ocular having a first index of refraction for light having a first polarization axis and a second index of refraction, lower than the first index by at least 0.1, for light having a second polarization axis that is orthogonal to the first polarization axis, wherein the birefringent ocular defines an eye box for a viewer. An image source emits image-bearing light having the first polarization axis. A polarization beam splitter is disposed to reflect the image-bearing light of the first polarization axis toward the birefringent ocular and further disposed to transmit, from an object scene, light having the second polarization axis.
24 Citations
16 Claims
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1. A display apparatus comprising:
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a) a birefringent compound lens having a first optical power for light having a first polarized axis and a second optical power for light having a second polarization axis that is orthogonal to the first polarization axis, wherein the first optical power ranges between 14.3 and 50 diopters and the second optical power is less than 1 diopter and wherein the birefringent compound lens serves as an ocular and provides an eye box for a viewer; b) an image source that emits image-bearing light having the first polarization axis; and c) a polarization beam splitter disposed to reflect the image-bearing light of the first polarization axis toward the birefringent compound lens and further disposed to transmit, from an object scene, light having the second polarization axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A display apparatus comprising:
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right-eye and left-eye imaging apparatus, each imaging apparatus having; (i) a birefringent compound lens having a first optical power for light having a first polarization axis and a second optical power, for light having a second polarization axis that is orthogonal to the first polarization axis, wherein the first optical power ranges between 14.3 and 50 diopters and the second optical power is less than 1 diopter and wherein the birefringent compound lens serves as an ocular and provides an eye box for a viewer; (ii) an image source that forms an image having the first polarization axis; and (iii) a polarization beam splitter disposed to reflect image-bearing light of the first polarization axis toward the birefringent compound lens and further disposed to transmit, from a real-world field of view of the viewer, light having the second polarization axis.
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15. A display apparatus comprising:
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a) a birefringent compound lens, circularly symmetric and centered along an optical axis and having a first index for light having a first polarization axis and a second index of refraction, lower than the first index by at least 0.1, for light having a second polarization axis that is orthogonal to the first polarization axis, wherein the birefringent compound lens serves as an ocular and defines an eye box for a viewer, and wherein the lens optical power with respect to the first polarization axis ranges between 14.3 and 50 diopters and the lens optical power with respect to the second polarization is less than 1 diopter; b) first and second image sources that each emit image-bearing light having the first polarization axis; and c) a polarization beam splitter having two surfaces at opposite angles with respect to the optical axis, each surface disposed to reflect the image-bearing light from a corresponding image source into the birefringent compound lens and further disposed to transmit, from an object scene, light having the second polarization axis. - View Dependent Claims (16)
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Specification