Lens

Details Lens Lens

1976-06-03

1978-05-02

Sacher, Paul A.

350176, 350209, G02B 960

Patent

active

040871614

ABSTRACT:
A lens of five elements comprising a first bi-convex element, a second meniscus element, a third bi-concave element, a fourth meniscus element, and a fifth bi-convex element with an aperture stop between the meniscuses and the concave surfaces of the meniscuses facing the aperture.

REFERENCES:
patent: 871559 (1907-11-01), Beck
patent: 2383115 (1945-08-01), Durand
patent: 3486810 (1969-12-01), Hoogland

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