Patent US3133983A successfully refreshed from Google Patents.
US3133983A
Expired / Lapsed
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Symmetrical type of projection objective
Assignee: Bausch and Lomb Inc
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Filing: 1962-06-27
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Granted: 1964-05-19
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Expires: 1982-06-27
Abstract
No abstract record available.
Inventors
- 👤 Rickless Nathan
- 👤 Paul L Ruben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:56
CPC Classifications
G; G02; G02B; G02B13/00; G02B13/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
A SYMMETRICAL TYPE OF PROJECTION OBJECTIVE FOR COPY AND PROCESS OPERATIONS WORKING AT UNEQUAL CONJUGATES WITHIN A RANGE OF MAGNIFICATIONS BETWEEN .40X AND 1.0X, SAID OBJECTIVE COMPRISING FIVE SINGLET OPTICALLY ALIGNED LENSES, SAID LENSES BEING A CENTRAL NEGATIVE LENS LOCATED ADJACENT TO A DIAPHRAGM, A PAIR OF POSITIVE LENSES SPACED AT EITHER SIDE OF SAID CENTRAL LENS AND HAVING A CONVEX SURFACE TURNED OUTWARDLY, AND A PAIR OF NEGATIVE MENISCUS LENSES SPACED AT EITHER SIDE OF SAID POSITIVE LENSES AND HAVING A CONCAVE SURFACE TURNED TOWARD THE CENTRAL LENS, THE FOCAL LENGTH OF EACH OF THE NEGATIVE MENISCUS LENSES BEING SUBSTANTIALLY -1.095F, THE FOCAL LENGTH OF EACH OF THE POSITIVE LENSES BEING SUBSTANTIALLY +.323F, THE FOCAL LENGTH OF SAID CENTRAL LENS BEING SUBSTANTIALLY -.270F, THE AXIAL AIR SPACES BETWEEN EITHER MENISCUS LENS AND ITS ADJACENT POSITIVE LENS BEING BETWEEN .0185F AND .0226F, AND THE AXIAL DISTANCE BETWEEN THE INNER FACES OF SAID POSITIVE LENSES AND THE ADJACENT FACE OF SAID CENTRAL LENS BEING SUBSTANTIALLY BETWEEN .0327F AND .0399F, WHEREIN F REPRESENTS THE EQUIVALENT FOCAL LENGTH OF SAID OBJECTIVE.
Claim 2
Dependent Claim
178 words
A SYMMETRICAL TYPE OF PROJECTION OBJECTIVE FOR COPY AND PROCESS OPERATIONS WORKING AT UNEQUAL CONJUGATES WITHIN A RANGE OF MAGNIFICATIONS BETWEEN .40X AND 1.0X, SAID OBJECTIVE COMPRISING FIVE SINGLET OPTICALLY ALIGNED LENSES, SAID LENSES BEING A CENTRAL NEGATIVE LENS LOCATED ADJACENT TO A DIAPHRAGM, A PAIR OF POSITIVE LENSES SPACED AT EITHER SIDE OF SAID CENTRAL LENS AND HAVING A CONVEX SURFACE TURNED OUTWARDLY, AND A PAIR OF NEGATIVE MENISCUS LENSES SPACED AT EITHER SIDE OF SAID POSITIVE LENSES AND HAVING A CONCAVE SURFACE TURNED TOWARD THE CENTRAL LENS, THE FOCAL LENGTH OF EACH OF THE NEGATIVE MENISCUS LENSES BEING SUBSTANTIALLY -1.095F, THE FOCAL LENGTH OF EACH OF THE POSITIVE LENSES BEING SUBSTANTIALLY +.323F, THE FOCAL LENGTH OF SAID CENTRAL LENS BEING SUBSTANTIALLY -.270F, THE AXIAL AIR SPACES BETWEEN EITHER MENISCUS LENS AND ITS ADJACENT POSITIVE LENS BEING BETWEEN .0185F AND .0226F, AND THE AXIAL DISTANCE BETWEEN THE INNER FACES OF SAID POSITIVE LENSES AND THE ADJACENT FACE OF SAID CENTRAL LENS BEING SUBSTANTIALLY BETWEEN .0327F AND .0399F, WHEREIN F REPRESENTS THE EQUIVALENT FOCAL LENGTH OF SAID OBJECTIVE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-05-19 | 1967-11-18 | 1968-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-19 | 1971-11-18 | 1972-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-19 | 1975-11-18 | 1976-05-19 | $7700.00 | Window Closed / Lapsed |