Variable focal length lens

Details Variable focal length lens Variable focal length lens

1993-02-22

1994-10-04

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359683, G02B 1514

Patent

active

053531612

ABSTRACT:
A variable focal length lens comprises a first-set lens, which is constituted of two lenses and has a negative refracting power as a whole, and a second-set lens, which is constituted of five lenses and has a positive refracting power as a whole. The first-set lens and the second-set lens are located in this order from the side of a plane of image formation. The variable focal length lens satisfies the following condition formulas

REFERENCES:
patent: 3870401 (1975-03-01), Muszumanski

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