Wide angle objective lens


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G02B 964




A wide angle objective lens comprising from front to rear a double-plano filter, a negative meniscus lens element, a second negative meniscus lens element, a cemented doublet consisting of a biconvex lens element and a biconcave lens element, a second cemented doublet consisting of a biconcave lens element and a positive meniscus lens element, a third cemented doublet consisting of two plano-convex lens elements, a negative meniscus lens element and a double-plano protective cover plate.

patent: 3234849 (1966-02-01), Back


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