Super wide-angle zoom lens system

Details Super wide-angle zoom lens system Super wide-angle zoom lens system

2005-09-06

2005-09-06

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S684000

Reexamination Certificate

active

06940655

ABSTRACT:
An object of the present invention is to provide a super wide-angle zoom lens system having an angle of view of 2ω=100° or more, a zoom ratio of about 2, the f-number of about f/4, sufficient amount of peripheral light quantity, high optical performance, and aspherical surfaces capable of being manufactured easily. According to one aspect of the present invention, in order from an object, a first lens group G1having negative refractive power, and a second lens group G2having positive refractive power are provided. Zooming is carried out by varying a distance between the first lens group G1and the second lens group G2.The first lens group G1has a negative lens component Ln and a positive lens component Lp. The negative lens component Ln has at least one aspherical lens Lasp. The aspherical lens Lasp satisfies given conditional expressions.

REFERENCES:
patent: 5329401 (1994-07-01), Sato
patent: 6169636 (2001-01-01), Kreitzer
patent: 6308011 (2001-10-01), Wachi et al.
patent: 2002/0057505 (2002-05-01), Sato
patent: 11-287953 (1999-10-01), None
patent: 2000-2837 (2000-01-01), None
patent: 2001-159732 (2001-06-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3428814