Substrate-Guided Optical Device Utilzing Thin Transparent Layer
First Claim
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1. An optical device, comprising:
- a light-transmitting substrate having at least two major surfaces and edges;
optical means for coupling light waves into said substrate by total internal reflection, anda plurality of partially reflecting surfaces carried by said substrate, wherein said partially reflecting surfaces are parallel to each other and are not parallel to any of the edges of said substrate;
characterized in that at least one of said partially reflecting surfaces does not intersect with at least one of said two major surfaces, and wherein said optical means intersects with at least one of said two major surfaces.
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Abstract
There is provided an optical device, including a light-transmitting substrate having two major surfaces and edges, an optical element (16) for coupling light waves into the substrate by total internal reflexion, and a plurality of partially reflecting surfaces (22a, 22b, 22c) carried by the substrate. The partially reflecting surfaces are parallel to each other and are not parallel to any of the edges of the substrate. At least one of the partially reflecting surfaces (22a, 22b, 22c) does not intersect with at least one of the two major surfaces, and the optical element (16) intersects with at least one of the two major surfaces.
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Citations
25 Claims
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1. An optical device, comprising:
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a light-transmitting substrate having at least two major surfaces and edges; optical means for coupling light waves into said substrate by total internal reflection, and a plurality of partially reflecting surfaces carried by said substrate, wherein said partially reflecting surfaces are parallel to each other and are not parallel to any of the edges of said substrate; characterized in that at least one of said partially reflecting surfaces does not intersect with at least one of said two major surfaces, and wherein said optical means intersects with at least one of said two major surfaces. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. An optical device, comprising:
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a first light-transmitting substrate having at least a first and a second major surface and edges; optical means for coupling light into said substrate by total internal reflection, and a plurality of partially reflecting surfaces carried by said first substrate wherein said partially reflecting surfaces are parallel to each other and are not parallel to any of the edges of said substrate; characterized in that all of said partially reflecting surfaces intersect with said first and second major surfaces, and wherein said optical means intersects with at least one of said first or second major surfaces; further comprising a light transmitting plate having at least two major surfaces, wherein one of said major surfaces is attached to one of the first or second major surfaces of said first substrate. - View Dependent Claims (23, 24, 25)
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Specification