Optical apparatus having a zoom lens system

Details Optical apparatus having a zoom lens system Optical apparatus having a zoom lens system

1993-09-20

1995-08-08

Epps, Georgia Y.

Optical: systems and elements

Lens

With variable magnification

359513, 359601, 359611, 359612, G02B 1514, G02B 2700

Patent

active

054404312

ABSTRACT:
The optical apparatus has a pair of relatively movable lens groups which are disposed on the common axis and a light intercepting member secured to and between the two lens groups. The light intercepting member is a thin, relatively long rectangular strip which is helically wound to form a plurality of coils. In an expanded state, the coils are overlapped to prevent incident light from passing into a space between the lens groups. At the same time, the strip is elastically resilient as to maintain the spacing between the two lens groups.

REFERENCES:
patent: 967143 (1910-08-01), Arriaga
patent: 3951522 (1976-04-01), Hashimoto
patent: 4752798 (1988-06-01), Chrosziel
patent: 5033819 (1991-07-01), Tanaka
patent: 5056903 (1991-10-01), Nakamura et al.
patent: 5077569 (1991-12-01), Notagashira et al.
patent: 5309278 (1994-05-01), Ito et al.

Affiliated with

Also associated with

Rating

Optical apparatus having a zoom lens system does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-975791