US3345912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary shearing interferometer
Assignee: International Business Machines Corp
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Filing: 1964-03-10
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Granted: 1967-10-10
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Adolf W Lohmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:45
CPC Classifications
G; G01; G01J; G01J9/00; G01J9/02; G01J9/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
59 words
A DEVICE FOR DETECTING COMATIC ABERRATION IN A LENS: MEANS FOR PASSING TWO COHERENT OPTICAL WAVEFRONTS THROUGH SAID LENS; MEANS FOR ROTATING SAID WAVEFRONTS BY SUBSTANTIALLY 180 DEGREES RELATIVE TO EACH OTHER; AND MEANS COOPERATING WITH SAID LENS FOR FOCUSSING AND INTERACTING SAID WAVEFRONTS THEREBY FORMING AN INTERFERENCE PATTERN, WHEREBY THE COMATIC ABERRATION OF SAID LENS CAN BE DETECTED.
Claim 2
Independent Claim
59 words
A DEVICE FOR DETECTING COMATIC ABERRATION IN A LENS: MEANS FOR PASSING TWO COHERENT OPTICAL WAVEFRONTS THROUGH SAID LENS; MEANS FOR ROTATING SAID WAVEFRONTS BY SUBSTANTIALLY 180 DEGREES RELATIVE TO EACH OTHER; AND MEANS COOPERATING WITH SAID LENS FOR FOCUSSING AND INTERACTING SAID WAVEFRONTS THEREBY FORMING AN INTERFERENCE PATTERN, WHEREBY THE COMATIC ABERRATION OF SAID LENS CAN BE DETECTED.
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) | 1970-10-09 | 1971-04-10 | 1971-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-09 | 1975-04-10 | 1975-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-09 | 1979-04-10 | 1979-10-10 | $7700.00 | Window Closed / Lapsed |