Zoom lens and video camera comprising the same

Details Zoom lens and video camera comprising the same Zoom lens and video camera comprising the same

1996-02-20

1999-08-17

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359683, 359708, G02B 1514

Patent

active

059402210

ABSTRACT:
A compact zoom lens comprising a small number of lenses, providing an aperture of about F1.4 and a zoom ration of about 14, with a full angle of view at the wide angle end of 64.degree. or wider. The zoom lens of the present invention comprises, aligned respectively from the object side, a fixed first lens group, comprising a lens with a negative refracting power, a lens with a positive refracting power, and a meniscus lens with a positive refracting power; a movable second lens group to provide zooming effect, comprising a lens with a negative refracting power, a biconcave lens with a negative refracting power, and a lens with a positive refracting power, with at least one surface of these lenses aspheric; a fixed third lens group with a positive refracting power, with at least one surface of these lenses aspheric; a fourth lens group, movable for compensating the position of the focal plane, with a positive refracting power, with at least one surface of the lenses aspheric. The below mentioned formula (1) is satisfied,

REFERENCES:
patent: 5000551 (1991-03-01), Shibayama
patent: 5235466 (1993-08-01), Ono et al.
patent: 5363242 (1994-11-01), Yokota
patent: 5396367 (1995-03-01), Ono et al.
patent: 5430576 (1995-07-01), Hamano
patent: 5568321 (1996-10-01), Ogawa et al.
patent: 5570233 (1996-10-01), Mihara et al.

Affiliated with

Also associated with

Rating

Zoom lens and video camera comprising the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom lens and video camera comprising the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens and video camera comprising the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-320459