Zoom lens

Details Zoom lens Zoom lens

1990-10-01

1993-01-12

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359680, 359681, G02B 1514

Patent

active

051794730

ABSTRACT:
A zoom lens includes, in succession from the greatly conjugate side to the little conjugate side, a first lens unit having negative refractive power, and a second lens unit having positive refractive power. Zooming from the wide angle side to the telephoto side is effected by at least the second lens unit being moved toward the greatly conjugate side. The zoom lens satisfies the following condition:

REFERENCES:
patent: 4153339 (1979-05-01), Tajima et al.
patent: 4198128 (1980-04-01), Ogino
patent: 4484799 (1984-11-01), Doi et al.
patent: 4726667 (1988-02-01), Tachihara
patent: 4807982 (1989-02-01), Tsuji
patent: 4830477 (1989-05-01), Kitagishi et al.
patent: 4907866 (1990-03-01), Takahashi et al.
patent: 4963005 (1990-10-01), Tsuji
patent: 5000550 (1991-03-01), Takahashi et al.
patent: 5011272 (1991-04-01), Kitagishi et al.

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