Prism telescope to match optical requirements for acousto-optic deflector
Patent 4701031 Issued on October 20, 1987. Estimated Expiration Date: 
May 29, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
May 29, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2843015 3799652 3810688 In-line optical anamorphic beam expander/contractor Bragg cell spectral analyzer with a prism expansion system Patent #: 4626102 InventorsApplicationNo. 06/868379 filed on 05/29/1986US Classes:359/305Acousto-opticExaminersPrimary: Arnold, Bruce Y.Assistant: Lerner, Martin Attorney, Agent or FirmInternational ClassesG02B 23/00 (20060101)G02B 26/08 (20060101) G02F 1/33 (20060101) G02F 1/29 (20060101) AbstractTwo identical prism telescopes each comprised of a train of right angle prisms are used to spread out a laser beam to the maximum width of an acousto-optic cell and reconverge the beam to original dimensions. The first telescope increases the beam size along one dimension while bending the beam through 90°. The second telescope reduces the beam size and multiplies the angle of deflection while redirecting the beam through another 90°. There is a 180° fold in optical path and this configuration is compact, has low losses, and is easy to mount and align.Other References
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