Patent US4584485A successfully refreshed from Google Patents.
US3170984A
Expired / Lapsed
US
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Zoom optical system
Assignee: Bausch and Lomb Inc
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Filing: 1961-05-29
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Granted: 1965-02-23
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Harold E Rosenberger
- 👤 Herbert D Korones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:22
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/04; G02B7/10; G02B15/00; G02B15/14; G02B15/142; G02B15/1421; G02B21/00; G02B21/02; G02B21/025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A ZOOM TYPE OF PANCRATIC OPTICAL SYSTEM CORRECTED FOR CHROMATIC AND MONOCHROMATIC IMAGE ABERRATIONS AND HAVING A SUBSTANTIALLY FLAT FIELD, SAID SYSTEM COMPRISING A FRONT LENS MEMBER WHICH CONSISTS OF A COMPOUND MENISCUS LENS WHICH IS CONCAVE ON THE OBJECT SIDE AND HAS A POSITIVE FOCAL LENGTH OF BETWEEN 5.0F1 AND 6.0F1 WHERE F1 IS THE FOCAL LENGTH OF THE FRONT MEMBER AND IS COMPOSED OF A FRONT DOUBLE CONCAVE ELEMENT HAVING ITS SURFACE OF STRONGEST CURVATURE IN CONTACT WITH A REAR DOUBBLE CONVEX ELEMENT AND FURTHER INCLUDES A DOUBLE CONVEX ING A POSITIVE FOCAL LENGTH OF BETWEEN 1.2F1 AND 1.4F1, SAID SYSTEM COMPRISING A DOUBLE CONCAVE COMPOUND REAR LENS MEMBER WHICH IS OPTICALLY ALINGED REARWARDLY OF THE FRONT MEMBER AND HAS A NEGATIVE FOCAL LENGTH A FRONT DOUBLE CONCAVE ELEMENT HAVING ITS SURFACE OF CONVEX-CONCAVE ELEMENT HAVING ITS SURFACE OF STRONGEST CURVATURE FORMING AN INTERFACE WITH A REAR CONVEX-CONCAVO ELEMENT WHEREIN THE CONCAVO SURFACE IS REARMOST AND HAS WEAKER CURVATURE THAN THE INTERFACE, SAID MEMBERS BEING MOVABLE WITH RESPECT TO A FIXED
Claim 2
Dependent Claim
173 words
A ZOOM TYPE OF PANCRATIC OPTICAL SYSTEM CORRECTED FOR CHROMATIC AND MONOCHROMATIC IMAGE ABERRATIONS AND HAVING A SUBSTANTIALLY FLAT FIELD, SAID SYSTEM COMPRISING A FRONT LENS MEMBER WHICH CONSISTS OF A COMPOUND MENISCUS LENS WHICH IS CONCAVE ON THE OBJECT SIDE AND HAS A POSITIVE FOCAL LENGTH OF BETWEEN 5.0F1 AND 6.0F1 WHERE F1 IS THE FOCAL LENGTH OF THE FRONT MEMBER AND IS COMPOSED OF A FRONT DOUBLE CONCAVE ELEMENT HAVING ITS SURFACE OF STRONGEST CURVATURE IN CONTACT WITH A REAR DOUBBLE CONVEX ELEMENT AND FURTHER INCLUDES A DOUBLE CONVEX ING A POSITIVE FOCAL LENGTH OF BETWEEN 1.2F1 AND 1.4F1, SAID SYSTEM COMPRISING A DOUBLE CONCAVE COMPOUND REAR LENS MEMBER WHICH IS OPTICALLY ALINGED REARWARDLY OF THE FRONT MEMBER AND HAS A NEGATIVE FOCAL LENGTH A FRONT DOUBLE CONCAVE ELEMENT HAVING ITS SURFACE OF CONVEX-CONCAVE ELEMENT HAVING ITS SURFACE OF STRONGEST CURVATURE FORMING AN INTERFACE WITH A REAR CONVEX-CONCAVO ELEMENT WHEREIN THE CONCAVO SURFACE IS REARMOST AND HAS WEAKER CURVATURE THAN THE INTERFACE, SAID MEMBERS BEING MOVABLE WITH RESPECT TO A FIXED
References Cited (Backward Citations)
US2844996A
Cited
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 |