US3822936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical system for panoramic projection
Assignee: Individual
•
Filing: 1973-02-23
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Granted: 1974-07-09
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Expires: 1993-02-23
Abstract
Abstract An overhead projector is combined with a reflecting prism and an assembly of frusto-conical reflecting surfaces, each of which is individually adjustable with respect to the others, to produce panoramic motion picture images on a circular screen disposed peripherally about an audience.
Inventors
- 👤 G Troje
- 👤 E Schiavone
- 👤 J Pinzone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:56
CPC Classifications
G; G03; G03B; G03B37/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
114 words
An optical system for projecting a panoramic image comprising an optically reflective screen extending through an arc of 360*, at least three frusto-conical elements each of which has an optically reflective surface at least one of said frusto-conical elements being hollow and having an interior surface which is optically reflective, means for mounting said frusto-conical elements in adjustable relationship with respect to each other, the axes of said elements being concentric with each other and with the central aixs of said screen, and means for projecting light ray images onto the optically reflective surfaces of said frusto-conical elements, said elements being positioned in such relationship as to produce a panoramic image on said screen.
Claim 2
Dependent Claim
114 words
An optical system for projecting a panoramic image comprising an optically reflective screen extending through an arc of 360*, at least three frusto-conical elements each of which has an optically reflective surface at least one of said frusto-conical elements being hollow and having an interior surface which is optically reflective, means for mounting said frusto-conical elements in adjustable relationship with respect to each other, the axes of said elements being concentric with each other and with the central aixs of said screen, and means for projecting light ray images onto the optically reflective surfaces of said frusto-conical elements, said elements being positioned in such relationship as to produce a panoramic image on said screen.
Claim 3
Dependent Claim
26 words
The combination according to claim 1 wherein two of said frusto-conical elements are hollow and larger than a third element located between said two larger elements.
Claim 4
Dependent Claim
17 words
The combination according to claim 2 wherein said third element includes a plurality of frusto-conical reflecting surfaces.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |