US3904289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flight simulator visual display system
Assignee: United States Department of the Navy
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Filing: 1975-01-10
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Granted: 1975-09-09
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Expires: 1995-01-10
Abstract
Abstract A wide field, high brightness, large exit pupil, visual display system for a flight simulator includes two stage projection to correct for perspective and a rotating periscope for scene integration and ultimate display to a pilot positioned at an exit pupil conjugate to the periscope projector.
Inventors
- 👤 William C Yager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:43
CPC Classifications
G; G09; G09B; G09B9/00; G09B9/02; G09B9/08; G09B9/30; G09B9/32; G09B9/326; G03; G03B; G03B21/00; G03B21/14; G03B21/28; G03B21/54; G03B21/56; G03B21/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
Apparatus for displaying the image of a scene in proper perspective and with conservation of scene brightness, comprising: a first substantially spherical dimpled mirror; first scene projector means, positioned within said first mirror, for projecting an image of said scene upon said first mirror; a second substantially spherical dimpled mirror having an entrance pupil and an exit pupil located at conjugate points; second scene projector means, substantially positioned at the entrance pupil of said second mirror, for projecting the image of said scene upon said second mirror; and scene receptor and relay means, having a portion thereof positioned within said first mirror at a substantially conjugate point with respect to said first scene projector means, for receiving the reflected image from said first mirror and for providing said image to said second scene projector; whereby said scene image may be viewed at said exit pupil of said second mirror.
Claim 2
Dependent Claim
149 words
Apparatus for displaying the image of a scene in proper perspective and with conservation of scene brightness, comprising: a first substantially spherical dimpled mirror; first scene projector means, positioned within said first mirror, for projecting an image of said scene upon said first mirror; a second substantially spherical dimpled mirror having an entrance pupil and an exit pupil located at conjugate points; second scene projector means, substantially positioned at the entrance pupil of said second mirror, for projecting the image of said scene upon said second mirror; and scene receptor and relay means, having a portion thereof positioned within said first mirror at a substantially conjugate point with respect to said first scene projector means, for receiving the reflected image from said first mirror and for providing said image to said second scene projector; whereby said scene image may be viewed at said exit pupil of said second mirror.
Claim 3
Dependent Claim
221 words
Apparatus for displaying in proper perspective the images of a plurality of scenes while preserving scene brightness comprising: a plurality of dimpled, substantially spherical, initial display mirrors each having an entrance pupil and exit pupil located at conjugate points; a plurality of scene projectors each of which is substantially positioned at the entrance pupil of a respective one of said initial display mirrors and each of which is adapted to project an image of a selected one of said plurality of scenes onto a respective initial display mirror; a dimpled, substantially spherical, final display mirror, having an entrance pupil and an exit pupil located at conjugate points; projection means, substantially positioned at the entrance pupil of said final display mirror, for projecting the images of said plurality of scenes upon said final display mirror; collecting means, operatively connected to said projection means, for providing said plurality of scene images to said projection means; and a plurality of scene receptors each of which is substantially positioned at the exit pupil of a respective one of said initial display mirrors and each of which is adapted to receive the image reflected from a respective initial mirror and to provide said image to said collecting means; whereby said plurality of scene images may be viewed at said exit pupil of said final display mirror.
Claim 4
Dependent Claim
221 words
Apparatus for displaying in proper perspective the images of a plurality of scenes while preserving scene brightness comprising: a plurality of dimpled, substantially spherical, initial display mirrors each having an entrance pupil and exit pupil located at conjugate points; a plurality of scene projectors each of which is substantially positioned at the entrance pupil of a respective one of said initial display mirrors and each of which is adapted to project an image of a selected one of said plurality of scenes onto a respective initial display mirror; a dimpled, substantially spherical, final display mirror, having an entrance pupil and an exit pupil located at conjugate points; projection means, substantially positioned at the entrance pupil of said final display mirror, for projecting the images of said plurality of scenes upon said final display mirror; collecting means, operatively connected to said projection means, for providing said plurality of scene images to said projection means; and a plurality of scene receptors each of which is substantially positioned at the exit pupil of a respective one of said initial display mirrors and each of which is adapted to receive the image reflected from a respective initial mirror and to provide said image to said collecting means; whereby said plurality of scene images may be viewed at said exit pupil of said final display mirror.
Claim 5
Dependent Claim
57 words
Apparatus according to claim 2 further including: a plurality of first motive means, each of which is operatively connected to a respective one of said plurality of scene projectors, for rotating said scene projectors in synchronism and with a predetermined phase relationship; and second motive means operatively connected to said projection means for rotating said projection means.
Claim 6
Dependent Claim
23 words
Apparatus according to claim 3 wherein each of said plurality of scene projectors illuminates a selected portion of a respective initial display mirror.
Claim 7
Dependent Claim
39 words
Apparatus according to claim 4 wherein the exit pupil each initial display mirror is larger than the entrance pupil and the exit pupil of said final display mirror is larger than the entrance pupil of said final display mirror.
Claim 8
Dependent Claim
45 words
Apparatus according to claim 3 wherein said collecting means includes a plurality of reflecting means, each of which is responsive to an image provided by a respective one of said plurality of scene receptors, for transferring said images from said receptors to said projection means.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |