Compact wide-angle zoom lens

Details Compact wide-angle zoom lens Compact wide-angle zoom lens

1991-05-15

1992-09-01

Arnold, Bruce Y.

Optical: systems and elements

Lens

With variable magnification

359692, G02B 1514

Patent

active

051444895

ABSTRACT:
A compact wide angle zoom lens has a view angle as wide as 65.degree.-72.degree. and a magnification varied by changing an inter-group spacing. The zoom lens comprises a first lens group having a positive refractive power and a second lens group having a negative refractive power. The first lens group, sequentially from an object, includes a front group having a positive refractive power and a rear group having a positive refractive power. The front group includes a meniscus first lens component having a positive refractive power, a second lens component with its more intensive concave surface directed to the object, having a negative refractive power, a third lens component having a positive or negative refractive power, and a fourth lens component having a positive refractive power. The rear group includes a fifth lens component having a positive refractive power. The second lens group includes a meniscus sixth lens component having a positive refractive power, a meniscus seventh lens component having a negative refractive power, and a meniscus eighth lens component having a negative refractive power.

REFERENCES:
patent: 4911539 (1990-03-01), Tsunashima et al.

Affiliated with

Also associated with

Rating

Compact wide-angle zoom lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Compact wide-angle zoom lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compact wide-angle zoom lens will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-772749