Zoom lens system

Details Zoom lens system Zoom lens system

1995-12-13

1999-10-26

Epps, Georgia

Optical: systems and elements

Lens

With graded refractive index

359691, 359692, 359717, G02B 300, G02B 1514

Patent

active

059738499

ABSTRACT:
A zoom lens system has a plurality of lens units. Zooming is performed by varying distances between the lens units. A gradient index lens is included in the lens units. The gradient index lens has a gradient index in a direction vertical to an optical axis. The gradient index lens has at least one aspherical surface.

REFERENCES:
patent: 4883346 (1989-11-01), Aoki et al.
patent: 5087988 (1992-02-01), Nakayama
patent: 5196962 (1993-03-01), Aoki
patent: 5325235 (1994-06-01), Takashima et al.
patent: 5327290 (1994-07-01), Fukushima et al.
patent: 5353160 (1994-10-01), Ogata
patent: 5361167 (1994-11-01), Aoki
patent: 5414560 (1995-05-01), Kiriki
patent: 5424870 (1995-06-01), Hashimura et al.
patent: 5434711 (1995-07-01), Tetsuya et al.
patent: 5541775 (1996-07-01), Kiriki

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