Objective lens assembly
Patent 4779967 Issued on October 25, 1988. Estimated Expiration Date: 
July 1, 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.
July 1, 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 1848788 2533371 3514186 3861786 Variable magnification endoscope Patent #: 4664486 InventorsAssigneeApplicationNo. 06/880777 filed on 07/01/1986US Classes:359/379, Spacing of optical elements axially adjustable359/387, With annular lighting structure359/661Having less than four componentsExaminersPrimary: Punter, William H.Attorney, Agent or FirmInternational ClassesG02B 21/02 (20060101)G02B 6/04 (20060101) AbstractAn objective lens system having a pair of plano-convex lenses disposed adjacent each other with the convex surfaces facing each other and aligned along common optical axis. A plurality of optical fibers surround the plan-convex lenses to convey light and illuminate an object to be viewed by the objective lens assembly. Adjustably positioned adjacent the second plano-convex lens is a field lens system including an elongate rod lens for conducting the intermediate image from the plano-convex lenses and to relay it to an ocular lens system for viewing by the user.Other References
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