Patent US3224323A successfully refreshed from Google Patents.
US3224323A
Expired / Lapsed
US
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Interferometric optical angle measuring device
Assignee: Optomechanisms Inc
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Filing: 1961-10-19
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Granted: 1965-12-21
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Expires: 1981-10-19
Abstract
No abstract record available.
Inventors
- 👤 Anwar K Chitayat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
182 words
MEANS FOR ACCURATELY MEASURING THE ANGLE OF ROTATION OF A FIRST MIRROR ROTATABLE ABOUT A PIVOT POINT, COMPRISING A SECOND MIRROR HAVING A FIXED ANGULAR RELATION TO SAID FIRST MIRROR, AN OPTICAL FLAT HAVING A FIXED POSITION AND SPACED CLOSELY TO SAID SECOND MIROR, A SOURCE OF LIGHT DIRECTED TOWARD SAID OPTICAL FLAT AND SAID SECOND MIRROR TO PRODUCE A FRINGE PATTERN, A VIEWING SCREEN, AND A SEMIREFLECTING MIRROR PLACED BETWEEN SAID LIGHT SOURCE AND SAID OPTICAL FLAT AND ADAPTED TO REFLECT A FRINGE PATTERN REFLECTED FROM SAID SECOND MIRROR ONTO SAID VIEWING SCREEN, MECHANICAL MEANS TO MEASURE THE ROTATION OF SAID FIRST MIRROR TO PROVIDE A COARSE READING COMPRISING A FIRST LEVER CONNECTED TO SAID SECOND MIRROR AT ONE END, A KNIFE EDGE ON THE OTHER END OF SAID FIRST LEVER, A SECOND LEVER PIVOTALLY MOUNTED ON THE NEUTRAL AXIS OF SAID FIRST LEVER, SAID SECOND LEVER HAVING A BEARING BLOCK ADJACENT ONE END BEARING AGAINST SAID KNIFE EDGE, AND A MICROMETER BEARING AGAINST THE OTHER END OF SAID SECOND LEVER, AND MEANS TO MEASURE THE SPACINGS OF SAID FRINGE PATTERN.
Claim 2
Dependent Claim
182 words
MEANS FOR ACCURATELY MEASURING THE ANGLE OF ROTATION OF A FIRST MIRROR ROTATABLE ABOUT A PIVOT POINT, COMPRISING A SECOND MIRROR HAVING A FIXED ANGULAR RELATION TO SAID FIRST MIRROR, AN OPTICAL FLAT HAVING A FIXED POSITION AND SPACED CLOSELY TO SAID SECOND MIROR, A SOURCE OF LIGHT DIRECTED TOWARD SAID OPTICAL FLAT AND SAID SECOND MIRROR TO PRODUCE A FRINGE PATTERN, A VIEWING SCREEN, AND A SEMIREFLECTING MIRROR PLACED BETWEEN SAID LIGHT SOURCE AND SAID OPTICAL FLAT AND ADAPTED TO REFLECT A FRINGE PATTERN REFLECTED FROM SAID SECOND MIRROR ONTO SAID VIEWING SCREEN, MECHANICAL MEANS TO MEASURE THE ROTATION OF SAID FIRST MIRROR TO PROVIDE A COARSE READING COMPRISING A FIRST LEVER CONNECTED TO SAID SECOND MIRROR AT ONE END, A KNIFE EDGE ON THE OTHER END OF SAID FIRST LEVER, A SECOND LEVER PIVOTALLY MOUNTED ON THE NEUTRAL AXIS OF SAID FIRST LEVER, SAID SECOND LEVER HAVING A BEARING BLOCK ADJACENT ONE END BEARING AGAINST SAID KNIFE EDGE, AND A MICROMETER BEARING AGAINST THE OTHER END OF SAID SECOND LEVER, AND MEANS TO MEASURE THE SPACINGS OF SAID FRINGE PATTERN.
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 |