Zoom lens with high zoom ratio

Details Zoom lens with high zoom ratio Zoom lens with high zoom ratio

1995-04-07

1996-12-17

Hindi, Nabil Z.

Optical: systems and elements

Lens

With variable magnification

359715, G02B 1514, G02B 302

Patent

active

055859704

ABSTRACT:
A zoom lens with a high zoom ratio has, in the following order from the object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, and attains zooming from the wide-angle end to the telephoto end by reducing the air gap between the first and second lens units, extending the air gap between the second and third lens units, and reducing the air gap between the third and fourth lens units.

REFERENCES:
patent: 4759617 (1988-07-01), Tokumaru et al.
patent: 5276553 (1994-01-01), Tatsuno

Affiliated with

Also associated with

Rating

Zoom lens with high zoom ratio 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 with high zoom ratio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom lens with high zoom ratio will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1996564