US3701602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-axis optical alignment system including a spatial filter
Assignee: Grumman Corp
•
Filing: 1971-04-30
•
Granted: 1972-10-31
•
Expires: 1991-04-30
Abstract
Abstract A MULTI-AXIS OPTICAL ALIGNMENT SYSTEM USING A HOLOGRAPHIC LENS. A SPATIALLY FILTERED, COLLIMATED BEAM OF LIGHT IS DIVIDED BY THE HOLOGRAPHIC LENS INTO THREE DISTINCT PATH, AN UNDIFFRACTED BEAM, A CONVERGING BEAM, AND A DIVERGING BEAM. THE UNDIFFRACTED BEAM INTERCEPTS A POSITION-SENSITIVE PHOTODETECTOR TO MONITOR LINEAR DISPLACEMENT AND THE CONVERING BEAM IS FOCUSED ON A SIMILAR DETECTOR TO MONITOR ANGULAR DISPLACEMENT. THE DIVERGING BEAM IS DIRECTED THROUGH A WOLLASTON PRISM AND DETECTOR ARRANGEMENT TO MONITOR DISPLACEMENT ABOUT THE ROLL AXIS. TWO METHODS FOR MAKING THE HOLOGRAPHIC LENS USED IN THE SYSTEM ARE DISCLOSED.
Inventors
- 👤 Michael T Bergin
- 👤 Charles S Bartolotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:32
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |