US3698792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically transparent acoustic wave transducer
Assignee: HP Inc
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Filing: 1970-12-28
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Granted: 1972-10-17
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Expires: 1990-12-28
Abstract
Abstract An acoustic wave transducer mounted on the input face of a body of optically anisotropic birefringent material is provided with an electrode structure for permitting substantially unobstructed passage of a light beam through the transducer and into the body of optically anisotropic birefringent material and for producing a tangential electric field in the transducer to generate an acoustic wave that propagates collinearly with the light beam into the body of optically anisotropic birefringent material.
Inventors
- 👤 John A Kusters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:09
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; B; B06; B06B; B06B1/00; B06B1/02; B06B1/06; B06B1/0644; G; G02; G02F; G02F1/00; G02F1/01; G02F1/11; G02F1/116
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
Apparatus for diffracting light from a first polarization to a second polarization, said apparatus comprising a body of optically anisotropic birefringent material, an optically transparent electro-acoustic transducer mounted at one end of said body, means for passing a light beam of the first polarization through said transducer into said body, an electrode structure mounted on said transducer for permitting passage of the light beam of the first polarization through said transducer and into said body, and means including said electrode structure for producing a tangential electric field in said transducer normal to the path of the light beam therethrough to generate an acoustic wave that propagates substantially collinearly with the light beam of the first polarization into said body, light of the first polarization being diffracted on the acoustic wave in said body and thereby shifted to the second polarization.
Claim 2
Dependent Claim
140 words
Apparatus for diffracting light from a first polarization to a second polarization, said apparatus comprising a body of optically anisotropic birefringent material, an optically transparent electro-acoustic transducer mounted at one end of said body, means for passing a light beam of the first polarization through said transducer into said body, an electrode structure mounted on said transducer for permitting passage of the light beam of the first polarization through said transducer and into said body, and means including said electrode structure for producing a tangential electric field in said transducer normal to the path of the light beam therethrough to generate an acoustic wave that propagates substantially collinearly with the light beam of the first polarization into said body, light of the first polarization being diffracted on the acoustic wave in said body and thereby shifted to the second polarization.
Claim 3
Dependent Claim
28 words
Apparatus as in claim 1 wherein said electrode structure comprises a pair of spaced-apart electrodes mounted on one surface of said transducer through which the light beam passes.
Claim 4
Dependent Claim
28 words
Apparatus as in claim 2 wherein said electrode structure further comprises a second pair of spaced-apart electrodes mounted on another surface of said transducer opposite said one surface.
Claim 5
Dependent Claim
15 words
Apparatus as in claim 2 wherein said pair of spaced-apart electrodes forms an interdigital structure.
Claim 6
Dependent Claim
14 words
Apparatus as in claim 2 including an acoustic frequency source coupled to said electrodes.
Claim 7
Dependent Claim
15 words
Apparatus as in claim 1 wherein said transducer comprises a rotated Y-cut lithium niobate crystal.
Claim 8
Dependent Claim
27 words
A transducer as in claim 6 wherein the surface normal of said crystal is rotated approximately 58.6* from the positive crystalline Y-axis toward the negative crystalline Z-axis.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |