Zoom lens

Details Zoom lens Zoom lens

1997-07-18

1999-12-28

Nelms, David

Optical: systems and elements

Lens

With variable magnification

359717, 359795, G02B 1514, G02B 302, G02B 904

Patent

active

060089539

ABSTRACT:
A compact and lightweight zoom lens includes a first lens unit having a positive refractive power and a second lens unit having a negative refractive power, and performs zooming by changing the distance between the first and second lens units. The zoom lens satisfies required conditions related to the glass material, lens shape and optical power of the first and second lens units, and achieves a high zooming ratio ranging from 2.6 to 3 and high optical performance.

REFERENCES:
patent: 5218478 (1993-06-01), Itoh
patent: 5274504 (1993-12-01), Itoh
patent: 5305148 (1994-04-01), Ikemori et al.
patent: 5353163 (1994-10-01), Shibayama et al.
patent: 5365376 (1994-11-01), Itoh
patent: 5574599 (1996-11-01), Hoshi et al.
patent: 5585971 (1996-12-01), Itoh
patent: 5587840 (1996-12-01), Itoh
patent: 5633760 (1997-05-01), Shibayama
patent: 5687027 (1997-11-01), Itoh
patent: 5815320 (1998-09-01), Hoshi et al.
patent: 5831772 (1998-11-01), Nishio et al.
patent: 5844725 (1998-12-01), Itoh

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2386452