Wide-angle lens system

Details Wide-angle lens system Wide-angle lens system

2005-02-08

2005-02-08

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S689000, C359S691000, C359S716000, C359S717000, C359S740000, C359S749000, C359S753000, C359S793000

Reexamination Certificate

active

06853495

ABSTRACT:
A wide-angle lens system having a long back focal length, disposed in front of a ⅓″ CCD camera and the focal length (f) for all lens groups is 3.0 mm, the F-number is 3.0 and the half-field angle is 46°. The following conditions are met by the first lens group: 1≦d/d3<1.2; R3/R2=0.99; and d2/f=0.03. Here, (d) indicates the thickness of the second lens along the normal line at a given distance from the optical axis within the maximum effective diameter of the object side convex surface of the lens. d3is the thickness of the second lens along the optical axis.

REFERENCES:
patent: 6154322 (2000-11-01), Nakayama
patent: 6298172 (2001-10-01), Arney et al.
patent: 6377404 (2002-04-01), Goosey, Jr.
patent: 6621645 (2003-09-01), Sato

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3480570