US3259014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light modulator using a variable spacing diffraction grating
Assignee: AT&T Inc
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Filing: 1961-06-30
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Granted: 1966-07-05
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Expires: 1981-06-30
Abstract
No abstract record available.
Inventors
- 👤 Leo F Johnson
- 👤 Kahng Dawon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:39
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/02; G02B26/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
LIGHT MODULATING APPARATUS COMPRISING A PIEZOELECTRIC MEMBER HAVING ON A SURFACE THEREOF AN OPTICAL DIFFRACTION GRATING CHARACTERIZED BY A PREDETERMINED GRATING SPACING, MEANS FOR PROJECTING A BEAM OF LIGHT TO BE MODULATED ONTO SAID GRATING THEREBY PRODUCING A DIFFRACTION PATTERN, MEANS FOR APPLYING TO SAID MEMBER A MODULATED OSCILLATORY ELECTRIC FIELD FOR CAUSING SAID MEMBER TO VIBRATE IN A FUNDAMENTAL RESONANT MODE, THE FREQUENCY OF SAID FIELD BEING SUBSTANTIALLY EQUAL TO THE FUNDAMENTAL NATURAL RESONANCE OF SAID MEMBER, THEREBY PRODUCING CORRESPONDING OSCCILLATORY CHANGES IN THE GRATING SPACING AND CONSEQUENTLY IN THE DIFFRACTION PATTERN, MEANS FOR MODULATING SAID OSCILLATORY ELECTRIC FIELD, AND OUTPUT MEANS RESPONSIVE TO THE MODULATION OF SAID OSCILLATORY CHANGES OF THE DIFFRACTION PATTERN.
Claim 2
Dependent Claim
115 words
LIGHT MODULATING APPARATUS COMPRISING A PIEZOELECTRIC MEMBER HAVING ON A SURFACE THEREOF AN OPTICAL DIFFRACTION GRATING CHARACTERIZED BY A PREDETERMINED GRATING SPACING, MEANS FOR PROJECTING A BEAM OF LIGHT TO BE MODULATED ONTO SAID GRATING THEREBY PRODUCING A DIFFRACTION PATTERN, MEANS FOR APPLYING TO SAID MEMBER A MODULATED OSCILLATORY ELECTRIC FIELD FOR CAUSING SAID MEMBER TO VIBRATE IN A FUNDAMENTAL RESONANT MODE, THE FREQUENCY OF SAID FIELD BEING SUBSTANTIALLY EQUAL TO THE FUNDAMENTAL NATURAL RESONANCE OF SAID MEMBER, THEREBY PRODUCING CORRESPONDING OSCCILLATORY CHANGES IN THE GRATING SPACING AND CONSEQUENTLY IN THE DIFFRACTION PATTERN, MEANS FOR MODULATING SAID OSCILLATORY ELECTRIC FIELD, AND OUTPUT MEANS RESPONSIVE TO THE MODULATION OF SAID OSCILLATORY CHANGES OF THE DIFFRACTION PATTERN.
References Cited (Backward Citations)
US2929242A
Cited
US2936381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |