Scope

Optical: systems and elements – Extended spacing structure for optical elements – Wide angle

Patent

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Details

359367, 359431, 359503, G02B 2504, G02B 700

Patent

active

057869359

ABSTRACT:
A scope apparatus is provided with an image forming optical system and a condenser lens on the exit side of the image forming optical system. The condenser lens is positioned so that a convex exit surface thereof is disposed in the vicinity of the image plane of the image forming optical system.

REFERENCES:
patent: 1971066 (1934-08-01), Eppenstein
patent: 2846918 (1958-08-01), Miles
patent: 4111561 (1978-09-01), Plummer
patent: 4172636 (1979-10-01), Yanagimachi
patent: 4558922 (1985-12-01), Smith
patent: 4726670 (1988-02-01), Sherrard
patent: 4892399 (1990-01-01), Ahn
patent: 5138487 (1992-08-01), Ahn
patent: 5245469 (1993-09-01), Goto
patent: 5276552 (1994-01-01), Kohmoto et al.
patent: 5357367 (1994-10-01), Goldstein

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