Patent US5178537A successfully refreshed from Google Patents.
US4383740A
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Infinity image visual display system
Assignee: REDIFFUSION SIMULATION Inc
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Filing: 1980-10-31
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Granted: 1983-05-17
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Expires: 2000-10-31
Abstract
Abstract An infinity image visual display system comprising an input image source, a concave projection mirror, a concave eyepiece mirror and a single path-folding beamsplitter. The projection mirror images the input image source at the focal surface of the eyepiece mirror, which image is reflected by the eyepiece mirror and focused at infinity.
Inventors
- 👤 Robert Bordovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:12
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/01; G02B27/0101; G02B2027/0118
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
148 words
An infinty image visual display system including an image source, an eyepiece mirror disposed remote from said image source for focussing a transmitted image of said image source located at its focal surface at infinity, means for transmitting said image of said image source from said image source to said focal surface of said eyepiece mirror along a folded, optically offset and non-orthometric path, a concave compound curved projection mirror selectively positioned in axially offset, non-orthometric relation to said image source to receive and reflect an image of said image source toward the focal surface of said eyepiece mirror, only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepeice mirror for cooperatively defining, in association with said selectively positioned projection mirror and image source, said optically offset and non-orthometrically folded image transfer path intermediate said image source and said eyepiece mirror.
Claim 2
Dependent Claim
148 words
An infinty image visual display system including an image source, an eyepiece mirror disposed remote from said image source for focussing a transmitted image of said image source located at its focal surface at infinity, means for transmitting said image of said image source from said image source to said focal surface of said eyepiece mirror along a folded, optically offset and non-orthometric path, a concave compound curved projection mirror selectively positioned in axially offset, non-orthometric relation to said image source to receive and reflect an image of said image source toward the focal surface of said eyepiece mirror, only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepeice mirror for cooperatively defining, in association with said selectively positioned projection mirror and image source, said optically offset and non-orthometrically folded image transfer path intermediate said image source and said eyepiece mirror.
Claim 3
Dependent Claim
28 words
An infinity image visual display system according to claim 1 further including a fold mirror disposed in the light path intermediate said projection mirror and said eyepiece mirror.
Claim 4
Dependent Claim
38 words
An infinity image visual display system according to claim 1 further including a positive field lens located adjacent to said visual image source and disposed in the light path between said visual image source and said projection mirror.
Claim 5
Dependent Claim
23 words
An infinity image visual display system according to claim 1 wherein said projection mirror is spherical and wherein said eyepiece mirror is spherical.
Claim 6
Dependent Claim
82 words
An infinity image visual display system including a visual image source, a concave ellipsoidal projection mirror, a single path-folding beamsplitter, and a concave spherical eyepiece mirror, said projection mirror having the foci thereof located at the visual image source and operative to image the latter at the focal surface of said eyepiece mirror, said eyepiece mirror reflecting the image and focusing the image at infinity, said path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror.
Claim 7
Dependent Claim
82 words
An infinity image visual display system including a visual image source, a concave ellipsoidal projection mirror, a single path-folding beamsplitter, and a concave spherical eyepiece mirror, said projection mirror having the foci thereof located at the visual image source and operative to image the latter at the focal surface of said eyepiece mirror, said eyepiece mirror reflecting the image and focusing the image at infinity, said path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror.
Claim 8
Dependent Claim
90 words
An infinity image visual display system including a visual image source, a concave projection mirror, a concave eyepiece mirror having a focal surface, said projection mirror positioned to image the visual image source at the focal surface of said eyepiece mirror, said eyepiece mirror reflecting the image and focussing the image at infinity, only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror and a fold mirror disposed in the light path generally midway between said projection mirror and said eyepiece mirror.
Claim 9
Dependent Claim
90 words
An infinity image visual display system including a visual image source, a concave projection mirror, a concave eyepiece mirror having a focal surface, said projection mirror positioned to image the visual image source at the focal surface of said eyepiece mirror, said eyepiece mirror reflecting the image and focussing the image at infinity, only one path-folding beamsplitter disposed in the light path between said visual image source and said eyepiece mirror and a fold mirror disposed in the light path generally midway between said projection mirror and said eyepiece mirror.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-16 | 1986-11-15 | 1987-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-16 | 1990-11-15 | 1991-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-16 | 1994-11-15 | 1995-05-17 | $7700.00 | Window Closed / Lapsed |