Behind stop lens

Details Behind stop lens Behind stop lens

1985-02-14

1987-06-30

Corbin, John K.

350450, G02B 920

Patent

active

046766073

ABSTRACT:
A behind stop lens comprises, in succession from the object side, a first lens which is a positive meniscus lens having its convex surface facing the object side, a second lens which is a biconcave lens, a third lens which is a biconvex lens, and a fourth lens which is a negative meniscus lens having its convex surface facing the image side. The third lens and the fourth lens are joined together to form a positive cemented lens. The behind stop lens has a stop at a position most adjacent to the image side.

REFERENCES:
patent: 4192579 (1980-03-01), Hyakumura
patent: 4606615 (1986-08-01), Wakamiya

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