Copying lens with a wide angle of view

Details Copying lens with a wide angle of view Copying lens with a wide angle of view

1986-08-28

1988-04-19

Corbin, John K.

G02B 964

Patent

active

047385170

ABSTRACT:
A copying lens having a wide angle of view is of a six-component, eighth-element configuration which is completely symmetrical with respect to an aperture stop. The first component is composed of a convex-meniscus lens having a convex surface directed toward the object side, and the second component is composed of a concave-meniscus lens having a convex surface directed toward the object side. The third component is composed of a double-convex lens and a double-concave lens which are joined to each other, with the double-convex lens being closer to the object side. The fourth, fifth, and sixth components are substantially same as the third, second, and first components. The fourth and third components, the fifth and second groups, and the sixth and first components are symmetrical with respect to the aperture stop. The copying lens meets the following conditions:

REFERENCES:
patent: 3922071 (1975-11-01), Kitagawa et al.

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