In-line optical anamorphic beam expander/contractor
Patent 4580879 Issued on April 8, 1986. Estimated Expiration Date: 
September 6, 2003. 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.
September 6, 2003. 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 References3871750 InventorAssigneeApplicationNo. 06/529425 filed on 09/06/1983US Classes:359/669, With prism anamorphoser359/640, Including prismatic element359/837With refracting surfaceExaminersPrimary: Corbin, John K.Assistant: Gass, Rebecca D. Attorney, Agent or FirmInternational ClassesG02B 13/10 (20060101)G02B 13/08 (20060101) G02B 27/09 (20060101) AbstractAn in-line anamorphic light beam expanding/contracting device utilizing two prisms and a planar mirror surface. The planar mirror surface reflectively directs the optical path of a light beam between the two prisms and the prisms provide light beam expansion by refracting. The device allows for a diminutive device which is especially useful in computer peripheral optical data storage equipment.Other References
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