US3170980A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical tunnel system
Assignee: RCA Corp
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Filing: 1962-05-09
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Granted: 1965-02-23
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Expires: 1982-05-09
Abstract
No abstract record available.
Inventors
- 👤 David E Pritchard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:56
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/04; G02B6/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN COMBINATION, FIRST AND SECOND OPTICAL TUNNELS ARRANGED ON A COMMON OPTICAL AXIS, EACH SAID TUNNEL COMPRISING A HOLLOW STRUCTURE OF REGULAR CROSS-SECTION AND HAVING INTERNAL MIRROR SURFACES; A PAIR OF LENSES, EACH LOCATED AT THE OUTPUT END OF A DIFFERENT ONE OF THE TUNNELS; DIFFUSING MEANS POSITIONED BETWEEN THE TWO TUNNELS AT THE INPUT END OF THE SECOND OPTICAL TUNNEL; A LIGHT SOURCE LOCATED AT THE INPUT END OF THE FIRST OPTICAL TUNNEL; AN OBJECT TO BE PROJECTED LOCATED BETWEEN THE LIGHT SOURCE AND THE INPUT END OF THE FIRST OPTICAL TUNNEL, WHEREBY MULTIPLE IMAGES OF SAID OBJECT ARE PROJECTED ONTO THE DIFFUSING MEANS WHEN THE OBJECT IS ILLUMINATED BY SAID LIGHT SOURCE; AND MEANS LOCATED AT THE OUTPUT END OF THE SECOND TUNNEL BEYOND THE LENS FOR RECEIVING MULTIPLE IMAGES OF THE MULTIPLE IMAGES APPEARING ON THE DIFFUSING MEANS.
Claim 2
Dependent Claim
141 words
IN COMBINATION, FIRST AND SECOND OPTICAL TUNNELS ARRANGED ON A COMMON OPTICAL AXIS, EACH SAID TUNNEL COMPRISING A HOLLOW STRUCTURE OF REGULAR CROSS-SECTION AND HAVING INTERNAL MIRROR SURFACES; A PAIR OF LENSES, EACH LOCATED AT THE OUTPUT END OF A DIFFERENT ONE OF THE TUNNELS; DIFFUSING MEANS POSITIONED BETWEEN THE TWO TUNNELS AT THE INPUT END OF THE SECOND OPTICAL TUNNEL; A LIGHT SOURCE LOCATED AT THE INPUT END OF THE FIRST OPTICAL TUNNEL; AN OBJECT TO BE PROJECTED LOCATED BETWEEN THE LIGHT SOURCE AND THE INPUT END OF THE FIRST OPTICAL TUNNEL, WHEREBY MULTIPLE IMAGES OF SAID OBJECT ARE PROJECTED ONTO THE DIFFUSING MEANS WHEN THE OBJECT IS ILLUMINATED BY SAID LIGHT SOURCE; AND MEANS LOCATED AT THE OUTPUT END OF THE SECOND TUNNEL BEYOND THE LENS FOR RECEIVING MULTIPLE IMAGES OF THE MULTIPLE IMAGES APPEARING ON THE DIFFUSING 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) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |