US3701583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acousto-optical filter having scanned acoustic frequency compensated by controlled distributed birefringence
Assignee: HP Inc
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Filing: 1970-12-14
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Granted: 1972-10-31
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Expires: 1990-12-14
Abstract
Abstract AN ELECTRONICALLY TUNABLE ACOUSTO-OPTIC FILTER IS SCANNED OVER A WIDE RANGE OF OPTICAL FREQUENCIES BY VARYING THE ACOUSTIC FREQUENCY AND IS PROVIDED WITH MEANS FOR CONTROLLABLY VARYING THE BIREFRINGENCE OF THE FILTER MEDIUM ALONG THE LENGTH THEREOF TO COMPENSATE FOR ACOUSTIC K VECTOR DISTRIBUTION THEREBY INCREASING THE RATE AT WHICH THE FILTER MAY BE SCANNED.
Inventors
- 👤 Donald L Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; G02F1/116
Claims Analysis
Total Claims: 0
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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 |