Two-group zoom lens

Details Two-group zoom lens Two-group zoom lens

1985-10-04

1988-02-23

Corbin, John K.

350432, G02B 1514, G02B 1318

Patent

active

047266660

ABSTRACT:
A zoom lens is known which has a first lens group having a negative refracting power and a second lens group having a positive refracting power arranged from an object side, a spacing between both the lens groups being varied to thereby vary magnification (variable power). In order to make such zoom lens compact, the refracting power of the negative lens group is intensified and the negative refracting power is arranged in a portion at the rear of the positive lens group. The portion in the positive lens group is composed of a set of positive and negative lenses, and at least one surface of the lenses is made to be an aspherical surface to correct aberrations.

REFERENCES:
patent: 4540249 (1985-09-01), Mogami

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