Zoom lens

Details Zoom lens Zoom lens

1983-06-02

1986-05-27

Corbin, John K.

350430, G02B 1500

Patent

active

045912440

ABSTRACT:
A zoom lens is composed of, in the order from the object side, a focusing lens unit of a positive refractive power, a variation lens unit of a negative refractive power, a compensator lens unit of a negative refractive power, a front relay lens group of a positive refractive power and a rear relay lens group of a positive refractive power. The rear relay lens group is composed of, in the order from the object side, a negative lens component and a positive lens component. Optimum conditions are employed in the refractive power arrangement of the front and rear relay lens groups and of the negative and positive components of the rear relay lens group, and in the distance between the negative and positive components of the rear relay lens group.

REFERENCES:
patent: 4080047 (1978-03-01), Uesugi et al.
patent: 4198126 (1980-04-01), Abe et al.

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