Zoom lens

Details Zoom lens Zoom lens

1993-04-12

1993-12-28

Dzierzynski, Paul M.

Optical: systems and elements

Lens

With variable magnification

359689, 359745, 359747, G02B 1516

Patent

active

052745040

ABSTRACT:
A simple zoom lens is disclosed having lens units of negative, positive and negative powers in this order from the object side, zooming from the wide-angle end to the telephoto end being performed by moving each lens unit toward the object side, and at least the leading negative and positive lens units each consisting of one lens.

REFERENCES:
patent: 4757336 (1988-07-01), Nakayama et al.
patent: 4934794 (1990-06-01), Ueda
patent: 5055868 (1991-10-01), Itoh et al.
patent: 5062695 (1991-11-01), Iwasaki
patent: 5078481 (1992-01-01), Nakayama et al.
patent: 5111338 (1992-05-01), Nakayama

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