US3316050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical modulator employing the dichroic absorption of antiferromagnetic nif2
Assignee: AT&T Inc
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Filing: 1963-08-09
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Granted: 1967-04-25
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Expires: 1983-08-09
Abstract
No abstract record available.
Inventors
- 👤 Ferguson James
- 👤 Darwin L Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:17
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/09; G02F1/091
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
AN OPTICAL MODULATOR COMPRISING A SINGLE CRYSTAL OF NIF2 CUT IN A WAFER SHAPE HAVING THE C-AXIS AND ONE A-AXIS IN THE PLANE OF THE WAFER, MEANS FOR MAINTAINING THE WAFER AT A TEMPERATURE BELOW 73* K., MEANS FOR DIRECTING LIGHT RADIATION THROUGH SAID CRYSTAL WAFER IN THE DIRECTION APPROXIMATELY CORRESPONDING WITH THE OTHER A-AXIS, MEANS FOR IMPRESSING A MODULATING MAGNETIC FIELD ON SAID CRYSTAL, SAID FIELD HAVING A VECTOR COMPONENT IN A DIRECTION NORMAL TO THE A-AXIS OF SPIN POLARIZATION OF THE CRYSTAL.
Claim 2
Dependent Claim
84 words
AN OPTICAL MODULATOR COMPRISING A SINGLE CRYSTAL OF NIF2 CUT IN A WAFER SHAPE HAVING THE C-AXIS AND ONE A-AXIS IN THE PLANE OF THE WAFER, MEANS FOR MAINTAINING THE WAFER AT A TEMPERATURE BELOW 73* K., MEANS FOR DIRECTING LIGHT RADIATION THROUGH SAID CRYSTAL WAFER IN THE DIRECTION APPROXIMATELY CORRESPONDING WITH THE OTHER A-AXIS, MEANS FOR IMPRESSING A MODULATING MAGNETIC FIELD ON SAID CRYSTAL, SAID FIELD HAVING A VECTOR COMPONENT IN A DIRECTION NORMAL TO THE A-AXIS OF SPIN POLARIZATION OF THE CRYSTAL.
References Cited (Backward Citations)
US2974568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-04-24 | 1970-10-24 | 1971-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-04-24 | 1974-10-24 | 1975-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-04-24 | 1978-10-24 | 1979-04-25 | $7700.00 | Window Closed / Lapsed |