Patent US4040722A successfully refreshed from Google Patents.
US4040722A
Expired / Lapsed
US
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Light beam controller
Assignee: OCE-BRUNING Inc A CORP OF DELAWARE
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Filing: 1976-03-29
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Granted: 1977-08-09
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Expires: 1996-03-29
Abstract
Abstract An acousto optical diffraction cell, capable of passing polychromatic radiation and useful in a high speed, high intensity character generator. A monoclinic prism behaves like a parallel plate of glass when deenergized, and diffracts light under Bragg angle conditions over a useful spectral range when energized, thus ensuring a high I1/I0 ratio. The cell can be used as a very fast linear scan device, or it can be used as a multiple light beam modulator.
Inventors
- 👤 Asger Torben Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:45
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/33
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
An acousto optical diffraction cell comprising: a. a piezoelectric transducer, including a pair of electrodes bonded to opposite sides of said transducer; b. a monoclinic prism bonded to said transducer in such a way, that an ultrasonic wavefront generated by said transducer propagates in a direction that makes the same acute angle with both surfaces where light enters and exits; c. the value of said acute angle is chosen such that incoming light of different wavelengths meet said ultrasonic wavefronts at angles that are substantially equal to the Bragg angle.
Claim 2
Dependent Claim
90 words
An acousto optical diffraction cell comprising: a. a piezoelectric transducer, including a pair of electrodes bonded to opposite sides of said transducer; b. a monoclinic prism bonded to said transducer in such a way, that an ultrasonic wavefront generated by said transducer propagates in a direction that makes the same acute angle with both surfaces where light enters and exits; c. the value of said acute angle is chosen such that incoming light of different wavelengths meet said ultrasonic wavefronts at angles that are substantially equal to the Bragg angle.
Claim 3
Dependent Claim
58 words
An acousto optical diffraction cell as in claim 1, where: a. at least one of said electrodes is divided into a number of separate sections; b. said separate sections being aligned in a row the direction of which is perpendicular to the direction of the incoming light beam and to the direction of propagation of said ultrasonic wavefront.
References Cited (Backward Citations)
US3462212A
Cited
US3931595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |