Zoom lens

Details Zoom lens Zoom lens

1982-03-31

1984-10-23

Corbin, John K.

350423, 350428, G02B 1514

Patent

active

044784961

ABSTRACT:
A zoom lens having, from front to rear, a 1st lens group of positive refractive power, a 2nd lens group of negative refractive power and a 3rd lens group of positive refractive power. The aforesaid 1st and 2nd lens groups being axially movable in opposite directions to each other to effect zooming, wherein the focal lengths, principal point intervals and lens forms of the aforesaid three lens groups, and the loci of movement of the 1st and 2nd lens groups are so properly determined that good correction of aberrations is achieved.

REFERENCES:
patent: 4348082 (1982-09-01), Ogawa

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