US3285124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High precision pointing interferometer with modified kosters prism
Assignee: Kollmorgen Corp
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Filing: 1964-10-26
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Granted: 1966-11-15
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Expires: 1984-10-26
Abstract
No abstract record available.
Inventors
- 👤 Gerald H Lovins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:15
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
AN INTERFEROMETER FOR MEASURING VERY SMALL ANGLES OF DISPLACEMENT OF A REFLECTING ELEMENT COMPRISING INTERFERENCE PRISM MEANS HAVING FIRST AND SECOND SIDE SURFACES INCLINED AT AN ANGLE, A BASE SURFACE, AND AN INTERNAL SEMIREFLECTING SURFACE POSITIONED SO THAT TWO LIGHT BEAMS WHICH ARE PRODUCED BY A BEAM WHICH ENTERS ONE SIDE SURFACE AND IS DIVIDED BY THE SEMIREFLECTING SURFACE ALONG A SELECTED LINE EXTENDING PARALLEL TO ALL THE PRISM SURFACES, AND WHICH EMERGE IN PARALLEL RAYS FROM THE BASE SURFACE SO AS TO BE INCIDENT PERPENDICULARLY ON THE REFLECTING ELEMENT, HAVE THE SAME EFFECTIVE PATH LENGTH BETWEEN THE SELECTED LINE OF INTERSECTION WITH THE SEMIREFLECTING SURFACE AND THE REFLECTING ELEMENT, THEREBY PRODUCING A ZERO ORDER FRINGE OF MAXIMUM CONTRAST AND HIGHER ORDER FRINGES OF REDUCED CONTRAST WITH WHITE LIGHT ILLUMINATION, LIGHT SOURCE MEANS ILLUMINATING THE PRISM THROUGH THE FIRST SIDE SURFACE WITH PARALLEL RAYS WHICH PASS THROUGH THE SELECTED LINE, DETECTING MEANS FOR DETECTING AN INTERFERENCE CONDITION POSITIONED TO RECEIVE LIGHT RAYS FROM THE SECOND SIDE SURFACE WHICH HAVE PASSED THROUGH THE SELECTED LINE, A
Claim 2
Dependent Claim
175 words
AN INTERFEROMETER FOR MEASURING VERY SMALL ANGLES OF DISPLACEMENT OF A REFLECTING ELEMENT COMPRISING INTERFERENCE PRISM MEANS HAVING FIRST AND SECOND SIDE SURFACES INCLINED AT AN ANGLE, A BASE SURFACE, AND AN INTERNAL SEMIREFLECTING SURFACE POSITIONED SO THAT TWO LIGHT BEAMS WHICH ARE PRODUCED BY A BEAM WHICH ENTERS ONE SIDE SURFACE AND IS DIVIDED BY THE SEMIREFLECTING SURFACE ALONG A SELECTED LINE EXTENDING PARALLEL TO ALL THE PRISM SURFACES, AND WHICH EMERGE IN PARALLEL RAYS FROM THE BASE SURFACE SO AS TO BE INCIDENT PERPENDICULARLY ON THE REFLECTING ELEMENT, HAVE THE SAME EFFECTIVE PATH LENGTH BETWEEN THE SELECTED LINE OF INTERSECTION WITH THE SEMIREFLECTING SURFACE AND THE REFLECTING ELEMENT, THEREBY PRODUCING A ZERO ORDER FRINGE OF MAXIMUM CONTRAST AND HIGHER ORDER FRINGES OF REDUCED CONTRAST WITH WHITE LIGHT ILLUMINATION, LIGHT SOURCE MEANS ILLUMINATING THE PRISM THROUGH THE FIRST SIDE SURFACE WITH PARALLEL RAYS WHICH PASS THROUGH THE SELECTED LINE, DETECTING MEANS FOR DETECTING AN INTERFERENCE CONDITION POSITIONED TO RECEIVE LIGHT RAYS FROM THE SECOND SIDE SURFACE WHICH HAVE PASSED THROUGH THE SELECTED LINE, A
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |