Three-group zoom lens

Details Three-group zoom lens Three-group zoom lens

1981-08-14

1984-05-22

Corbin, John K.

G02B 1516

Patent

active

044497911

ABSTRACT:
In a three-group zoom lens having, in succession from a remoter imaging conjugate plane side, a convergent first group, a divergent second group and a convergent third group, the second group has, in succession from the first group side, a first component including at least one negative meniscus lens having its convex surface facing the first group, a second component which is a positive meniscus lens having its concave surface facing the first group, a third component which is a negative lens, and a fourth component which is a positive lens.

REFERENCES:
patent: 4240700 (1980-12-01), Ogawa et al.
patent: 4380376 (1983-04-01), Suda et al.

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