Compact zoom lens

Details Compact zoom lens Compact zoom lens

1994-09-01

1995-12-26

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359714, G02B 1514

Patent

active

054792959

ABSTRACT:
A variable focal length optical system comprises, in the following order from the object side, a first lens group having positive refractive power, the first lens group including, in succession from the object side, a first lens component having positive refractive power, a second lens component comprising a cemented lens consisting of a negative lens component and a positive lens component, and a third lens component having positive refractive power, and a second lens group having negative refractive power, the second lens group including, in succession from the object side, a fourth lens component having positive refractive power, and a fifth lens component having negative refractive power. The variable focal length optical system satisfies the following condition:

REFERENCES:
patent: 4929069 (1990-05-01), Shibayama
patent: 5227920 (1993-07-01), Shibayama
patent: 5353163 (1994-10-01), Shibayama et al.

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