US3108152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Four member objectve lens
Assignee: Ernst Leitz Wetzlar GmbH
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Filing: 1960-12-28
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Granted: 1963-10-22
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Expires: 1980-12-28
Abstract
No abstract record available.
Inventors
- 👤 Hermanni Eugen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:56
CPC Classifications
G; G02; G02B; G02B9/00; G02B9/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
AN OBJECTIVE LENS COMPRISING A FIRST POSITIVE MENISCUS LENS MEMBER HAVING A FRONT RADIUS R1, AND AXIAL THICKNESS A1, AND A BACK RADIUS R2, A SECOND POSITIVE MENISCUS LENS MEMBER HAVING A FRONT RADIUS R3, AN AXIAL THICKNESS A3, AND A BACK RADIUS R4, THE TWO POSITIVE MENISCUS LENS MEMBERS BEING SEPARATED BY A THIN AIR LENS HAVING AN AXIAL THICKNESS A2, A NEGATIVE CEMENTED MENISCUS LENS MEMBER CONSISTING OF A FIRST LENS AND A SECOND LENS CEMENTED TOGETHER AT AN INTERFACE WITH A RADIUS R6, THE FIRST LENS HAVING A FRONT RADIUS R5 AND AN AXIAL THICKNESS A5, AND THE SECOND LENS HAVING A BACK RADIUS R7 AND AN AXIAL THICKNESS A6, THE SECOND POSITIVE MENISCUS LENS MEMBER AND THE FIRST LENS OF THE NEGATIVE MENISCUS LENS MEMBER BEING SEPARATED BY A THIN AIR LENS HAVING AN AXIAL THICKNESS A4, SAID MENISCUS LENS MEMBERS BEING ARRANGED ON ONE SIDE OF THE APERTURE AND A BACK LENS ON THE OTHER SIDE OF THE APERTURE, THE BACK LENS HAVING AN AXIAL THICKNESS A8, A FRONT RADIUS R8, AND BACK RADIUS R9, THE AXIAL DISTANCE BETWEEN THE NEGATIVE MENISCUS LENS MEMBER AND THE BACK LENS BEING A7 AND THE AXIAL DISTANCE FROM THE BACK LENS TO THE IMAGE RECEIVING SURFACE BEING A9, THE OBJECTIVE LENS HAVING THE FOLLOWING PARAMETERS, RELATED TO THE E-LINE:
Claim 2
Dependent Claim
221 words
AN OBJECTIVE LENS COMPRISING A FIRST POSITIVE MENISCUS LENS MEMBER HAVING A FRONT RADIUS R1, AND AXIAL THICKNESS A1, AND A BACK RADIUS R2, A SECOND POSITIVE MENISCUS LENS MEMBER HAVING A FRONT RADIUS R3, AN AXIAL THICKNESS A3, AND A BACK RADIUS R4, THE TWO POSITIVE MENISCUS LENS MEMBERS BEING SEPARATED BY A THIN AIR LENS HAVING AN AXIAL THICKNESS A2, A NEGATIVE CEMENTED MENISCUS LENS MEMBER CONSISTING OF A FIRST LENS AND A SECOND LENS CEMENTED TOGETHER AT AN INTERFACE WITH A RADIUS R6, THE FIRST LENS HAVING A FRONT RADIUS R5 AND AN AXIAL THICKNESS A5, AND THE SECOND LENS HAVING A BACK RADIUS R7 AND AN AXIAL THICKNESS A6, THE SECOND POSITIVE MENISCUS LENS MEMBER AND THE FIRST LENS OF THE NEGATIVE MENISCUS LENS MEMBER BEING SEPARATED BY A THIN AIR LENS HAVING AN AXIAL THICKNESS A4, SAID MENISCUS LENS MEMBERS BEING ARRANGED ON ONE SIDE OF THE APERTURE AND A BACK LENS ON THE OTHER SIDE OF THE APERTURE, THE BACK LENS HAVING AN AXIAL THICKNESS A8, A FRONT RADIUS R8, AND BACK RADIUS R9, THE AXIAL DISTANCE BETWEEN THE NEGATIVE MENISCUS LENS MEMBER AND THE BACK LENS BEING A7 AND THE AXIAL DISTANCE FROM THE BACK LENS TO THE IMAGE RECEIVING SURFACE BEING A9, THE OBJECTIVE LENS HAVING THE FOLLOWING PARAMETERS, RELATED TO THE E-LINE:
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) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |