Imaging lens

Details Imaging lens Imaging lens

2006-01-10

2006-01-10

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S715000

Reexamination Certificate

active

06985309

ABSTRACT:
An imaging lens includes, in order from the object side: a first lens component of negative refractive power with two aspheric surfaces including a concave surface near the optical axis on the image-side; a second lens component of positive refractive power with a convex surface on the object side; a third lens component having positive refractive power and including lens elements having positive and negative refractive powers; and a fourth lens component having an aspheric surface on the image side that is convex near the optical axis and is concave at the periphery. The imaging lens satisfies a specified condition to assure a sufficient back focus for insertion of additional optical elements, a sufficiently small imaging lens diameter, and favorable correction of aberrations. The imaging lens has a wide picture angle, consists of only 5 lens elements in the disclosed embodiments, and is particularly suited for a text imaging camera.

REFERENCES:
patent: 5999337 (1999-12-01), Ozaki
patent: 6222685 (2001-04-01), Yamada
patent: 6417975 (2002-07-01), Isono
patent: 6825993 (2004-11-01), Noda
patent: 6867933 (2005-03-01), Matsusaka
patent: 2001-21800 (2001-01-01), None
patent: 2001-100092 (2001-04-01), None

Affiliated with

Also associated with

Rating

Imaging lens does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3542314