US5212583A
Expired / Lapsed
US
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Adaptive optics using the electrooptic effect
Assignee: Raytheon Co
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Filing: 1992-01-08
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Granted: 1993-05-18
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Expires: 2012-01-08
Abstract
Abstract An adaptive electroopical lens system for use in optical data storage systems, optical phased arrays, laser or other optical projectors, and raster scanning devices, and the like. The invention provides an electrooptical means for scanning an optical beam or moving an optical storage or retrieval point. Beam movement is achieved electrooptically, by changing the index of refraction of an electrooptical material by controlling electric fields applied thereto. A plurality of electrodes are disposed on one surface of the electrooptic material and a ground electrode is disposed on the other. The electrodes are adapted to apply electric fields derived from a voltage source to the electroopic material that selectively change its index of refraction and provides for a predetermined index of refraction profile along at least one dimension thereof, thus forming a lens. By appropriately forming the electrode pattern and properly controlling the voltages applied thereto, differing lens shapes may be formed. Since the response times of the electrooptic materials employed in the present invention are on the order of nanoseconds (10 -9 sec) or less, the intrinsic response frequency of the lens system is 10 9 Hz or more. The present invention thus increases the data storage and retrieval capacity of optical systems in which it is employed.
Inventors
- 👤 Victor Vali
- 👤 David B. Chang
- 👤 I-Fu Shih
- 👤 Bruce R. Youmans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:55
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/292; G02F1/01; G02F1/03; G02F1/0305; G02F2201/00; G02F2201/12; G02F2202/00; G02F2202/20; G02F2203/00; G02F2203/18; G02F2203/24; G02F2203/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
215 words
An adaptive optical lens system comprising: an electrooptic material having first and second surfaces that are disposed normal to the direction of propagation of an optical beam through the adaptive optical lens system and having an index of refraction that is adjustable in response to an applied electric field; a first plurality of electrodes disposed on the first surface of the electrooptic material and at least one ground electrode disposed on the second surface of the electrooptic material that are adapted to apply electric fields thereto, which first plurality of electrodes and at least one ground electrode are substantially transparent to the optical beam, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a first dimension thereof to provide for a first predetermined index of refraction profile along the first dimension and thereby form a lens, and whereby the change in index of refraction across the first dimension is adapted to change the angle at which the optical beam entering the electrooptic lens exits the lens; and a first voltage source coupled to the first plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the plurality of electrodes to create the first predetermined index of refraction profile in the electrooptic material.
Claim 2
Dependent Claim
215 words
An adaptive optical lens system comprising: an electrooptic material having first and second surfaces that are disposed normal to the direction of propagation of an optical beam through the adaptive optical lens system and having an index of refraction that is adjustable in response to an applied electric field; a first plurality of electrodes disposed on the first surface of the electrooptic material and at least one ground electrode disposed on the second surface of the electrooptic material that are adapted to apply electric fields thereto, which first plurality of electrodes and at least one ground electrode are substantially transparent to the optical beam, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a first dimension thereof to provide for a first predetermined index of refraction profile along the first dimension and thereby form a lens, and whereby the change in index of refraction across the first dimension is adapted to change the angle at which the optical beam entering the electrooptic lens exits the lens; and a first voltage source coupled to the first plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the plurality of electrodes to create the first predetermined index of refraction profile in the electrooptic material.
Claim 3
Dependent Claim
16 words
The lens system of claim 1 wherein the electrooptic material comprises barium titanate (BaTiO 3 ).
Claim 4
Dependent Claim
16 words
The lens system of claim 1 wherein the electrooptic material comprises lithium niobate (LiNbO 3 ).
Claim 5
Dependent Claim
27 words
The lens system of claim 1 wherein the first plurality of electrodes comprises a plurality of parallel electrodes disposed across the first surface of the electrooptic material.
Claim 6
Dependent Claim
30 words
The lens system of claim 1 wherein the first plurality of electrodes comprises a grid of electrodes disposed on the first surface of the electrooptic material in a checkerboard pattern.
Claim 7
Dependent Claim
27 words
The lens system of claim 2 wherein the first plurality of electrodes comprises a plurality of parallel electrodes disposed across the first surface of the electrooptic material.
Claim 8
Dependent Claim
30 words
The lens system of claim 2 wherein the first plurality of electrodes comprises a grid of electrodes disposed on the first surface of the electrooptic material in a checkerboard pattern.
Claim 9
Dependent Claim
27 words
The lens system of claim 3 wherein the first plurality of electrodes comprises a plurality of parallel electrodes disposed across the first surface of the electrooptic material.
Claim 10
Dependent Claim
31 words
The lens system of claim 3 wherein the first plurality of electrodes comprises a parallel grid of electrodes disposed on the first surface of the electrooptic material in a checkerboard pattern.
Claim 11
Dependent Claim
26 words
The lens system of claim 1 wherein the first voltage source is adapted to provide electric fields in the range of 0 kV/centimeter to 100 kV/centimeter.
Claim 12
Dependent Claim
111 words
The lens system of claim 1 wherein the first plurality of electrodes comprises a plurality of spaced apart parallel electrodes disposed on the first surface of the electrooptic material, and wherein the lens system further comprises a second plurality of electrodes comprising a plurality of spaced apart parallel electrodes disposed on the first plurality of electrodes and oriented orthogonal thereto and which are substantially transparent to the optical beam, and a second voltage source coupled to the second plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the second plurality of electrodes to create a second predetermined index of refraction profile in the electrooptic material.
Claim 13
Dependent Claim
328 words
An adaptive optical lens system comprising: an electrooptic material having first and second surfaces that are disposed normal to the direction of propagation of an optical beam through the adaptive optical lens system and having an index of refraction that is adjustable in response to an applied electric field; a first plurality of electrodes disposed on the first surface of the electrooptic material and at least one ground electrode disposed on the second surface of the electrooptic material that are adapted to apply electric fields thereto, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a first dimension thereof to provide for a first predetermined index of refraction profile along the first dimension and thereby form a lens, and whereby the change in index of refraction across the first dimension is adapted to change the angle at which an optical beam entering the electrooptic lens exits the lens; a second plurality of electrodes comprising a plurality of spaced apart parallel electrodes disposed on the first plurality of electrodes and oriented orthogonal thereto, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a second dimension thereof to provide for a second predetermined index of refraction profile along the second dimension, and whereby the change in index of refraction across the second dimension is adapted to change the angle at which an optical beam entering the electrooptic lens exits the lens; a first voltage source coupled to the first plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the first plurality of electrodes to create the first predetermined index of refraction profile in the electrooptic material; and a second voltage source coupled to the second plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the second plurality of electrodes to create the second predetermined index of refraction profile in the electrooptic material.
Claim 14
Dependent Claim
328 words
An adaptive optical lens system comprising: an electrooptic material having first and second surfaces that are disposed normal to the direction of propagation of an optical beam through the adaptive optical lens system and having an index of refraction that is adjustable in response to an applied electric field; a first plurality of electrodes disposed on the first surface of the electrooptic material and at least one ground electrode disposed on the second surface of the electrooptic material that are adapted to apply electric fields thereto, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a first dimension thereof to provide for a first predetermined index of refraction profile along the first dimension and thereby form a lens, and whereby the change in index of refraction across the first dimension is adapted to change the angle at which an optical beam entering the electrooptic lens exits the lens; a second plurality of electrodes comprising a plurality of spaced apart parallel electrodes disposed on the first plurality of electrodes and oriented orthogonal thereto, which electric fields are adapted to selectively change the index of refraction of the electrooptical material across a second dimension thereof to provide for a second predetermined index of refraction profile along the second dimension, and whereby the change in index of refraction across the second dimension is adapted to change the angle at which an optical beam entering the electrooptic lens exits the lens; a first voltage source coupled to the first plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the first plurality of electrodes to create the first predetermined index of refraction profile in the electrooptic material; and a second voltage source coupled to the second plurality of electrodes and the at least one ground electrode for applying predetermined voltages to the second plurality of electrodes to create the second predetermined index of refraction profile in the electrooptic material.
Claim 15
Dependent Claim
16 words
The lens system of claim 12 wherein the electrooptic material comprises barium titanate (BaTiO 3 ).
Claim 16
Dependent Claim
16 words
The lens system of claim 12 wherein the electrooptic material comprises lithium niobate (LiNbO 3 ).
Claim 17
Dependent Claim
38 words
The lens system of claim 12 wherein the first and second voltage sources are adapted to provide electric fields in the range of 0 kV/centimeter to 100 kV/centimeter, respectively, to the first and second pluralities of positive electrodes.
Claim 18
Dependent Claim
28 words
The lens system of claim 12 wherein the first and second pluralities of electrodes and the at least one ground electrode are substantially transparent to the optical beam.
Claim 19
Dependent Claim
33 words
The lens system of claim 16 wherein the first and second pluralities of electrodes and the at least one ground electrode are disposed normal to the direction of propagation of an optical beam.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1996-05-17 | 1996-11-16 | 1997-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-17 | 2000-11-16 | 2001-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-17 | 2004-11-16 | 2005-05-18 | $7700.00 | Window Closed / Lapsed |