Zoom lens system

Details Zoom lens system Zoom lens system

1996-03-14

1998-02-24

Nelms, David C.

Optical: systems and elements

Lens

With variable magnification

G02B 1514

Patent

active

057216436

ABSTRACT:
A zoom lens system includes from the object side a first lens unit having a positive refractive power, a second lens unit having a positive refractive power, and a third lens unit having a negative refractive power. The third lens unit includes from the object side a positive lens and a negative lens. The zoom lens system meets the following conditions.

REFERENCES:
patent: 5331463 (1994-07-01), Yamanashi
patent: 5528429 (1996-06-01), Hagimori

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