Lens system

Details Lens system Lens system

2007-12-18

2008-12-02

Choi, William C (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S716000

Reexamination Certificate

active

07460315

ABSTRACT:
A lens system includes a positive refractive power first lens, a negative refractive power third lens, and a negative refractive power second lens in that order from the object side of the lens system. Wherein the lens system satisfies the following conditions: (1) D/TTL>1.2; (2) 4.5>R1R/R1F>2.2; and (3) f/R1F>3, wherein, D is the diameter of a maximal image circle of the lens system on a image plane of the lens system, TTL is a distance from a surface of the first lens facing the object side of the lens system to the image plane, R1R is the radius of curvature of a surface of the first lens facing the image side of the lens system, R1F is the radius of curvature of the surface of the first lens facing the object side of the lens system, and f is a focal length of the lens system.

REFERENCES:
patent: 5808815 (1998-09-01), Kouthoofd
patent: 7184225 (2007-02-01), Noda

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4028538