Infinity display apparatus using cylindrical beam-splitters
First Claim
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1. Apparatus for projecting at infinity an image of an object displayed on a convex surface, said apparatus comprising:
- (a) a pair of beam-splitters disposed on an optical axis between said surface and a would-be observer, each of said beam splitters comprising a flexible, semi-transparent, semi-reflective sheet; and
(b) means for imparting a substantially right cylindrical sector shape to each of said sheets, and for orienting said sheets such that the axis of curvature of one sheet is substantially perpindicular to axis of curvature of the other sheet.
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Abstract
Apparatus for projecting at infinity an image of an object displayed on a convex surface, such as a CRT or rear projection screen. Such apparatus comprises a pair of beam-splitters, preferably cylindrical in shape and arranged such that their respective axes of curvature are perpendicular to one another. Each beam-splitter has an optical power which compliments that of the other, whereby such elements share the image-forming function.
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6 Claims
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1. Apparatus for projecting at infinity an image of an object displayed on a convex surface, said apparatus comprising:
- (a) a pair of beam-splitters disposed on an optical axis between said surface and a would-be observer, each of said beam splitters comprising a flexible, semi-transparent, semi-reflective sheet; and
(b) means for imparting a substantially right cylindrical sector shape to each of said sheets, and for orienting said sheets such that the axis of curvature of one sheet is substantially perpindicular to axis of curvature of the other sheet. - View Dependent Claims (2, 3, 4, 5)
- (a) a pair of beam-splitters disposed on an optical axis between said surface and a would-be observer, each of said beam splitters comprising a flexible, semi-transparent, semi-reflective sheet; and
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6. Apparatus for projecting at infinity an image of an object displayed on a convex surface, said apparatus comprising a pair of crossed cylindrical beam-splitters disposed on an optical axis between the surface and a would-be observer, each of said beam-splitters comprising a flexible, semi-transparent, semi-reflective quarter-wave plate, a flexible plane polarizing plate which is laminated to said quarter-wave plate, and means for imparting a right cylindrical shape to each laminated structure.
Specification