Patent US3701585A successfully refreshed from Google Patents.
US3701585A
Expired / Lapsed
US
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Optical line scanner using the polarization properties of ferroelectric-ferroelastic crystals
Assignee: EIDP Inc
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Filing: 1971-02-26
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Granted: 1972-10-31
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Expires: 1991-02-26
Abstract
Abstract IN CERTAIN FERROELECTRIC-FERROELASTIC CRYSTALS, THE DOMAINS ARE BIAXIALLY BIREFRINGENT. THE REGION OF A LINEAR DOMAIN WALL DIVIDING ADJACENT DOMAINS TRANSMITS POLARIZED LIGHT HAVING A SUBSTANTIAL COMPONENT WHEREIN THE POLARIZATION DIRECTION IS UNCHANGED. WITH APPROPRIATE POLARIZATION FILTERING THE DIFFERENCE IN POLARIZATION PROPERTIES OF THE DOMAINS AND THE DOMAIN WALL CAN BE USED TO GENERATE A DARK LINE ON A LIGHT FIELD OR A LIGHT LINE ON A DARK FIELD CORRESPONDING ON THE DOMAIN WALL. THE DOMAIN WALL, AND THE CORRESPONDING OPTICAL LINE CAN BE MOVED IN RESPONSE TO ELECTRICAL OR MECHANICAL CONTROL SIGNALS TO PROVIDE AN OPTICAL LINE SCANNER.
Inventors
- 👤 John R Barkley
- 👤 James J O'reilly
- 👤 Robert K Waring Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:12
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/05
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 |