Zoom lens system

Details Zoom lens system Zoom lens system

1992-12-28

1996-08-06

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359687, 359686, G02B 1514

Patent

active

055439691

ABSTRACT:
A zoom lens system having in order from the object side, a first positive lens group, a second negative lens group and a third positive lens group. At least the second lens group and the third lens group are movable along an optical axis for changing magnification. This lens system further satisfies the following conditions:

REFERENCES:
patent: 3784284 (1974-01-01), Nakamura
patent: 3918797 (1975-11-01), Takano
patent: 4168110 (1979-09-01), Itoh
patent: 4196969 (1980-04-01), Itoh
patent: 4230397 (1980-10-01), Fleischman
patent: 4293197 (1981-10-01), Kobayashi et al.
patent: 4348082 (1982-09-01), Ogawa
patent: 4452513 (1984-06-01), Hamanishi
patent: 4576443 (1986-03-01), Itoh
patent: 4763998 (1988-08-01), Tsuji et al.
patent: 4844599 (1989-07-01), Ito
patent: 4871241 (1989-10-01), Matsuo
patent: 4917482 (1990-04-01), Ito
patent: 4991942 (1991-02-01), Fujibayashi et al.
patent: 5144488 (1992-09-01), Endo et al.
patent: 5257135 (1993-10-01), Kohno et al.

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