US3134840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical phase measuring apparatus
Assignee: International Business Machines Corp
•
Filing: 1961-04-10
•
Granted: 1964-05-26
•
Expires: 1981-04-10
Abstract
No abstract record available.
Inventors
- 👤 Gamo Hideya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:34
CPC Classifications
G; G01; G01J; G01J9/00; G01J9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
APPARATUS FOR THE MEASUREMENT OF THE PHASE BETWEEN THE VECTORS AND THE PHASE ANGLE OF THE PHASE COHERENCE FACTOR OF FIRST AND SECOND PARTIALLY COHERENT BEAMS, COMPRISING IN COMBINATION: A FIRST PHOTODETECTOR MEANS UPON WHICH SAID FIRST LIGHT BEAM IMPINGES, A SECOND PHOTODETECTOR MEANS UPON WHICH SAID SECOND LIGHT BEAM IMPINGES, A COHERENT BACKGROUND SOURCE OF LIGHT, FIRST MEANS FOR DIVIDING SAID COHERENT BACKGROUND INTO FIRST AND SECOND PORTIONS, SECOND MEANS FOR SELECTIVELY VARYING THE PHASE RELATIONSHIP $ BETWEEN SAID FIRST AND SECOND COHERENT PORTIONS, THIRD MEANS FOR LINEARLY POLARIZING SAID FIRST AND SECOND COHERENT PORTIONS BOTH AT THE SAME ANGLE $, MEANS FOR SELECTIVELY VARYING SAID ANGLE
Claim 2
Dependent Claim
108 words
APPARATUS FOR THE MEASUREMENT OF THE PHASE BETWEEN THE VECTORS AND THE PHASE ANGLE OF THE PHASE COHERENCE FACTOR OF FIRST AND SECOND PARTIALLY COHERENT BEAMS, COMPRISING IN COMBINATION: A FIRST PHOTODETECTOR MEANS UPON WHICH SAID FIRST LIGHT BEAM IMPINGES, A SECOND PHOTODETECTOR MEANS UPON WHICH SAID SECOND LIGHT BEAM IMPINGES, A COHERENT BACKGROUND SOURCE OF LIGHT, FIRST MEANS FOR DIVIDING SAID COHERENT BACKGROUND INTO FIRST AND SECOND PORTIONS, SECOND MEANS FOR SELECTIVELY VARYING THE PHASE RELATIONSHIP $ BETWEEN SAID FIRST AND SECOND COHERENT PORTIONS, THIRD MEANS FOR LINEARLY POLARIZING SAID FIRST AND SECOND COHERENT PORTIONS BOTH AT THE SAME ANGLE $, MEANS FOR SELECTIVELY VARYING SAID ANGLE
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) | 1967-05-26 | 1967-11-25 | 1968-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-05-26 | 1971-11-25 | 1972-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-05-26 | 1975-11-25 | 1976-05-26 | $7700.00 | Window Closed / Lapsed |