Patent US3224332A successfully refreshed from Google Patents.
US3224332A
Expired / Lapsed
US
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Afocal wide-angle supplementary objective
Assignee: Individual
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Filing: 1962-05-01
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Granted: 1965-12-21
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Expires: 1982-05-01
Abstract
No abstract record available.
Inventors
- 👤 Mikusch Berta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:38
CPC Classifications
G; G02; G02B; G02B15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
344 words
AN AFOCAL WIDE-ANGLE SUPPLEMENTARY OBJECTIVE FOR THE USE ON THE FRONT OF PHOTOGRAPHIC OBJECTIVES OF DIFFERENT, POSITIVE REFRACTIVE POWER COMPRISING A NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, A POSITIVE CEMENTED REAR COMPONENT AXIALLY ALIGNED AND APPROXIMATELY AFOCALLY SPACED FROM SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, SAID POSITIVE CEMENTED REAR COMPONENT CONSISTING OF ONE NEGATIVE AND TWO POSITIVE LENSES CEMENTED TOGETHER AND DEFINING TWO CEMENTED SURFACES, THE REARMOST OF SAID TWO CEMENTED SURFACES HAVING A POSITIVE REFRACTIVE POWER, THE OTHER OF SAID TWO CEMENTED SURFACES HAVING A NEGATIVE REFRACTIVE POWER, BOTH SAID CEMENTED SURFACES BEING CONCAVE TO SAID FOLLOWING PHOTOGRAPHIC OBJECTIVE, SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT AND SAID POSITIVE CEMENTED REAR COMPONENT INCLUDING ABNORMAL GLASS PAIRS, WHEREBY ONE LENS OF SAID GLASS PAIRS HAS A HIGHER REFRACTING INDEX AND A HIGHER ABBE DISPERSION NUMBER THAN THE OTHER LENS OF SAID GLASS PAIRS, SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT CONSISTING OF TWO LENSES CEMENTED TOGETHER AND DEFINING ONE CEMENTED SURFACE, SAID ONE CEMENTED SURFACE HAVING A NEGATIVE REFRACTIVE POWER, THE SURFACE OF SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT REMOTE FROM SAID POSITIVE CEMENTED REAR COMPONENT BEING OF A CONFIGURATION WITHIN A RANGE OF BEING PLANE TO BEING CONCAVE HAVING A LOW CURVATURE, THE RADIUS OF THE OUTER SURFACE FACING SAID POSITIVE CEMENTED REAR COMPONENT BEING AT LEAST APPROXIMATELY TWO-THIRDS OF THE ABSOLUTE VALUE OF THE FOCAL LENGTH OF SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, THE DIFFERENCE OF THE REFRACTIVE INDICES OF THE REARMOST OF SAID TWO CEMENTED SURFACES OF SAID POSITIVE CEMENTED REAR COMPONENT HAVING A POSITIVE REFRACTIVE POWER IS AT LEAST 0.15, THE RADIUS OF SAID REARMOST OF SAID TWO CEMENTED SURFACES IS NO MORE THAN ONE-THIRD OFF THE FOCAL LENGTH OF SAID POSITIVE CEMENTED REAR COMPONENT, THE DIFFERENCE OF THE REFRACTIVE INDICES OF SAID OTHER OF SAID TWO CEMENTED SURFACES OF SAID POSITIVE CEMENTED REAR COMPONENT HAVING A NEGATIVE REFRACTIVE POWER IS AT LEAST 0.07, AND THE RADIUS OF SAID OTHER OF SAID TWO CEMENTED SURFACES IS WITHIN A RANGE OF ONE-FOURTH TO ONE-FIFTH OF THE FOCAL LENGTH OF SAID POSITIVE CEMENTED REAR COMPONENT.
Claim 2
Dependent Claim
344 words
AN AFOCAL WIDE-ANGLE SUPPLEMENTARY OBJECTIVE FOR THE USE ON THE FRONT OF PHOTOGRAPHIC OBJECTIVES OF DIFFERENT, POSITIVE REFRACTIVE POWER COMPRISING A NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, A POSITIVE CEMENTED REAR COMPONENT AXIALLY ALIGNED AND APPROXIMATELY AFOCALLY SPACED FROM SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, SAID POSITIVE CEMENTED REAR COMPONENT CONSISTING OF ONE NEGATIVE AND TWO POSITIVE LENSES CEMENTED TOGETHER AND DEFINING TWO CEMENTED SURFACES, THE REARMOST OF SAID TWO CEMENTED SURFACES HAVING A POSITIVE REFRACTIVE POWER, THE OTHER OF SAID TWO CEMENTED SURFACES HAVING A NEGATIVE REFRACTIVE POWER, BOTH SAID CEMENTED SURFACES BEING CONCAVE TO SAID FOLLOWING PHOTOGRAPHIC OBJECTIVE, SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT AND SAID POSITIVE CEMENTED REAR COMPONENT INCLUDING ABNORMAL GLASS PAIRS, WHEREBY ONE LENS OF SAID GLASS PAIRS HAS A HIGHER REFRACTING INDEX AND A HIGHER ABBE DISPERSION NUMBER THAN THE OTHER LENS OF SAID GLASS PAIRS, SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT CONSISTING OF TWO LENSES CEMENTED TOGETHER AND DEFINING ONE CEMENTED SURFACE, SAID ONE CEMENTED SURFACE HAVING A NEGATIVE REFRACTIVE POWER, THE SURFACE OF SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT REMOTE FROM SAID POSITIVE CEMENTED REAR COMPONENT BEING OF A CONFIGURATION WITHIN A RANGE OF BEING PLANE TO BEING CONCAVE HAVING A LOW CURVATURE, THE RADIUS OF THE OUTER SURFACE FACING SAID POSITIVE CEMENTED REAR COMPONENT BEING AT LEAST APPROXIMATELY TWO-THIRDS OF THE ABSOLUTE VALUE OF THE FOCAL LENGTH OF SAID NEGATIVE CEMENTED FRONT DOUBLET COMPONENT, THE DIFFERENCE OF THE REFRACTIVE INDICES OF THE REARMOST OF SAID TWO CEMENTED SURFACES OF SAID POSITIVE CEMENTED REAR COMPONENT HAVING A POSITIVE REFRACTIVE POWER IS AT LEAST 0.15, THE RADIUS OF SAID REARMOST OF SAID TWO CEMENTED SURFACES IS NO MORE THAN ONE-THIRD OFF THE FOCAL LENGTH OF SAID POSITIVE CEMENTED REAR COMPONENT, THE DIFFERENCE OF THE REFRACTIVE INDICES OF SAID OTHER OF SAID TWO CEMENTED SURFACES OF SAID POSITIVE CEMENTED REAR COMPONENT HAVING A NEGATIVE REFRACTIVE POWER IS AT LEAST 0.07, AND THE RADIUS OF SAID OTHER OF SAID TWO CEMENTED SURFACES IS WITHIN A RANGE OF ONE-FOURTH TO ONE-FIFTH OF THE FOCAL LENGTH OF SAID POSITIVE CEMENTED REAR COMPONENT.
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) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |