Patent US3798269A successfully refreshed from Google Patents.
US3285128A
Expired / Lapsed
US
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Catadioptric objective
Assignee: Optische Werke G Rodenstock
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Filing: 1962-11-16
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Granted: 1966-11-15
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Expires: 1982-11-16
Abstract
No abstract record available.
Inventors
- 👤 Schlegel Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:51
CPC Classifications
G; G02; G02B; G02B17/00; G02B17/08; G02B17/0856; G02B17/0804; G02B17/0808; G02B17/0884
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A SPECULAR OBJECTIVE COMPRISING A PLANO-CONVEX FRONT LENS, THE PLANE SURFACE OF WHICH FACES OUTWARDLY SAID FRONT LENS HAVING A FOCAL LENGTH MORE THAN TWICE THE FOCAL LENGTH OF THE OBJECTIVE, A MASTER MIRROR DISPOSED APPROXIMATELY A DISTANCE ONE-HALF THE FOCAL LENGTH BEHIND SAID FRONT LENS, A DEFLECTION MIRROR BETWEEN THE FRONT LENS AND THE MASTER MIRROR IN THE SHAPE OF A DISPERSING MENISCUS AND HAVING A MIRROR COATED CONVEX SURFACE TO CONSTITUTE A COLLECTING LENS HAVING A FOCAL LENGTH OF AT LEAST THREE TIMES THE FOCAL LENGTH OF THE OBJECTIVE, SAID MASTER MIRROR HAVING A CENTRAL BORE THEREIN WHERETHROUGH LIGHT RAYS ARE REFLECTED BY THE DEFLECTION MIRROR, AND A BICONVEX CORRECTIONAL LENS IN SAID CENTRAL BORE OF THE MASTER MIRROR HAVING A FOCAL LENGTH APPROXIMATELY EQUAL TO THAT OF THE OBJECTIVE, ALL OF THE SAID LENSES BEING CONSTITUTED OF THE SAME MATERIAL, THE DISTANCE FROM THE CORRECTING LENS TO THE IMAGE PLANE OF THE OBJECTIVE BEING NO GREATER THAN 20% OF THE FOCAL LENGTH THEREOF.
Claim 2
Dependent Claim
166 words
A SPECULAR OBJECTIVE COMPRISING A PLANO-CONVEX FRONT LENS, THE PLANE SURFACE OF WHICH FACES OUTWARDLY SAID FRONT LENS HAVING A FOCAL LENGTH MORE THAN TWICE THE FOCAL LENGTH OF THE OBJECTIVE, A MASTER MIRROR DISPOSED APPROXIMATELY A DISTANCE ONE-HALF THE FOCAL LENGTH BEHIND SAID FRONT LENS, A DEFLECTION MIRROR BETWEEN THE FRONT LENS AND THE MASTER MIRROR IN THE SHAPE OF A DISPERSING MENISCUS AND HAVING A MIRROR COATED CONVEX SURFACE TO CONSTITUTE A COLLECTING LENS HAVING A FOCAL LENGTH OF AT LEAST THREE TIMES THE FOCAL LENGTH OF THE OBJECTIVE, SAID MASTER MIRROR HAVING A CENTRAL BORE THEREIN WHERETHROUGH LIGHT RAYS ARE REFLECTED BY THE DEFLECTION MIRROR, AND A BICONVEX CORRECTIONAL LENS IN SAID CENTRAL BORE OF THE MASTER MIRROR HAVING A FOCAL LENGTH APPROXIMATELY EQUAL TO THAT OF THE OBJECTIVE, ALL OF THE SAID LENSES BEING CONSTITUTED OF THE SAME MATERIAL, THE DISTANCE FROM THE CORRECTING LENS TO THE IMAGE PLANE OF THE OBJECTIVE BEING NO GREATER THAN 20% OF THE FOCAL LENGTH THEREOF.
References Cited (Backward Citations)
FR969797A
Cited
US2817270A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |