High variable magnification range zoom lens

Details High variable magnification range zoom lens High variable magnification range zoom lens

1991-11-15

1993-02-23

Sugarman, Scott J.

Optical: systems and elements

Lens

With variable magnification

359684, G02B 1514

Patent

active

051895579

ABSTRACT:
A high variable magnification range zoom lens is disclosed, comprising, in the order from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, a third lens unit having a positive refractive power, a fourth lens unit having a negative refractive power, a fifth lens unit having a positive refractive power, and a sixth lens unit having a negative refractive power, wherein letting the air separation between the i-th lens unit and the (i+1)st lens unit in the wide-angle end and the telephoto end be denoted by D.sub.iW and D.sub.iT, respectively, zooming from the wide-angle end to the telephoto end is performed so as to satisfy the following conditions:

REFERENCES:
patent: 4269484 (1981-05-01), Laurent
patent: 4896950 (1990-01-01), Endo et al.

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