US3672776A
Expired / Lapsed
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Holographic real-time interferometry with a reconstructed reference beam
Assignee: Northrop Grumman Space and Mission Systems Corp
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Filing: 1970-10-09
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Granted: 1972-06-27
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Expires: 1990-10-09
Abstract
Abstract THE HOLOGRAPHIC INTERFEROMETER MAKES USE OF THE STORED BEAM HOLOGRAM FOR INVESTIGATING A DISPLACED OR DISTORED OBJECT. ILLUMINATION OF THE STORED BEAM HOLOGRAM BY THE DISTORTED OBJECT WILL CAUSE THE GENERATION OF A DISTORTED REFERENCE BEAM. THE SUBJECT BEAM IS NOW BLOCKED OFF AND THE DISTORTED REFERENCE BEAM IS ALLOWED TO INTER- FERE WITH THE ORIGINAL REFERENCE BEAM. THIS WILL YIELD AN INTERFEROGRAM OR FRINGE PATTERN CORRESPONDING TO THE OBJECT DEFORMATION.
Inventors
- 👤 Robert E Brooks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:42
CPC Classifications
G; G01; G01B; G01B9/00; G01B9/02; G01B9/021; Y; Y10; Y10S; Y10S359/00; Y10S359/902
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |