Optical apparatus with flipped compound prism structures
First Claim
1. An optical apparatus comprising:
- a) a light guide;
b) an optical member comprising a body of optically transmissive material and having a textured major surface with an everted configuration or an inverted configuration;
the optical member being oriented such that the textured major surface receives light from said light guide and then said light passes through said body;
the textured surface comprising a first plurality of non-intersecting elongate features with a predetermined pitch and a second plurality of non-intersecting elongate features with a predetermined pitch;
the pluralities being angled with respect to each other by less than about 90° and
intersecting each other so as to form total internal reflection structures;
c) a spatial light modulator with rows or columns of pixels for receiving light from the optical member at a major surface;
d) adjacent first and second elongate features of the first plurality and adjacent first and second elongate features of the second plurality forming a projection extending away from said body and reaching an apex line for an everted configuration of the body or forming a projection extending towards said body and reaching an apex line for an inverted configuration of the body; and
e) the apex line being shorter than either the pitch of the first plurality and the pitch of the second plurality.
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Accused Products
Abstract
An optical apparatus comprises a light source, an optical member and a spatial light modulator. The optical member comprises optically transmissive material and has a textured major surface receiving light from the light source. The textured surface comprises first and second pluralities of non-intersecting elongate features. The pluralities are angled with respect to each other by less than about 90° and intersect each other so as to form total internal reflection structures. The spatial light modulator has rows or columns of pixels for receiving light from the optical member at a major surface. The light source may be (i) a light guide, or (ii) a source of light providing, to the optical member, light having a peak luminance that is shifted from a normal direction to the textured major surface by more than about 30°.
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Citations
24 Claims
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1. An optical apparatus comprising:
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a) a light guide; b) an optical member comprising a body of optically transmissive material and having a textured major surface with an everted configuration or an inverted configuration;
the optical member being oriented such that the textured major surface receives light from said light guide and then said light passes through said body;
the textured surface comprising a first plurality of non-intersecting elongate features with a predetermined pitch and a second plurality of non-intersecting elongate features with a predetermined pitch;
the pluralities being angled with respect to each other by less than about 90° and
intersecting each other so as to form total internal reflection structures;c) a spatial light modulator with rows or columns of pixels for receiving light from the optical member at a major surface; d) adjacent first and second elongate features of the first plurality and adjacent first and second elongate features of the second plurality forming a projection extending away from said body and reaching an apex line for an everted configuration of the body or forming a projection extending towards said body and reaching an apex line for an inverted configuration of the body; and e) the apex line being shorter than either the pitch of the first plurality and the pitch of the second plurality. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An optical apparatus comprising:
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a) a source of light; b) an optical member comprising a body of optically transmissive material and having a textured major surface with an everted configuration or an inverted configuration;
the optical member being oriented such that the textured major surface receives light from said source of light and then said light passes through said body;
the textured surface comprising a first plurality of non-intersecting elongate features with a predetermined pitch and a second plurality of non-intersecting elongate features with a predetermined pitch;
the pluralities being angled with respect to each other by less than about 90° and
intersecting each other so as to form total internal reflection structures;c) a spatial light modulator with rows or columns of pixels for receiving light from the optical member at a major surface; d) said source of light providing, to said optical member, light having a peak luminance that is shifted from a normal direction to said textured major surface by more than about 30°
;e) adjacent first and second elongate features of the first plurality and adjacent first and second elongate features of the second plurality forming a projection extending away from said body and reaching an apex line for an everted configuration of the body or forming a projection extending towards said body and reaching an apex line for an inverted configuration of the body; and f) the apex line being shorter than either the pitch of the first plurality and the pitch of the second plurality. - View Dependent Claims (21, 22, 23, 24)
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Specification