Zoom lens system

Details Zoom lens system Zoom lens system

1999-04-20

2000-06-06

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359639, 359726, 359732, 359740, 396354, G02B 1514, G02B 2712

Patent

active

060726377

ABSTRACT:
A zoom lens system that is free from parallax, is compact, and offers excellent optical performance has, from the object side, a positive first lens unit, a negative second lens unit, a positive third lens unit, and a negative fourth lens unit. The zoom lens system has a half-prism between the second lens unit and the third lens unit so that a light beam having passed through the second lens unit is split by reflection.

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patent: 4786150 (1988-11-01), Tsuji
patent: 5272565 (1993-12-01), Oshikiri

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