Retracting mechanism of a zoom lens barrel

Details Retracting mechanism of a zoom lens barrel Retracting mechanism of a zoom lens barrel

2005-05-03

2005-05-03

Ben, Loha (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S694000, C359S695000, C359S699000, C359S676000, C359S689000, C359S823000, C396S072000, C396S079000, C396S085000, C396S087000, C348S240300

Reexamination Certificate

active

06888685

ABSTRACT:
A retracting mechanism of a zoom lens barrel includes first, second and third lens groups, wherein the first and third lens groups are integrally moved along an optical axis during variation of a focal length, and wherein at least one of the first and third lens groups is moved relative to the other to reduce a distance therebetween when the zoom lens barrel is fully retracted. The retracting mechanism includes first, second and third lens group moving rings; a cam mechanism for independently moving the first and second lens group moving rings; a second lens group support frame; an intermediate member fixed to the second lens group support frame; and a biasing device for biasing the third lens group moving ring away from the first lens group moving ring. The biasing device functions between the intermediate member and the third lens group moving ring.

REFERENCES:
patent: 5450242 (1995-09-01), Kohmoto et al.
patent: 5488513 (1996-01-01), Tanaka
patent: 5589987 (1996-12-01), Tanaka
patent: 5636063 (1997-06-01), Kohmoto et al.
patent: 5646790 (1997-07-01), Kohmoto et al.
patent: 6104550 (2000-08-01), Azegami et al.
patent: 6469840 (2002-10-01), Nomura et al.
patent: 6469841 (2002-10-01), Nomura et al.
patent: 6747807 (2004-06-01), Iikawa et al.
patent: 6753911 (2004-06-01), Yamada et al.
patent: 6795251 (2004-09-01), Nomura et al.
patent: 7-53056 (1995-12-01), None
patent: 2537398 (1996-07-01), None

Affiliated with

Also associated with

Rating

Retracting mechanism of a zoom lens barrel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Retracting mechanism of a zoom lens barrel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retracting mechanism of a zoom lens barrel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3379039