Wide angle optical system and image pickup apparatus using...

Details Wide angle optical system and image pickup apparatus using... Wide angle optical system and image pickup apparatus using...

2009-11-03

2011-12-06

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S716000

Reexamination Certificate

active

08072696

ABSTRACT:
A wide angle optical system is formed by, in order from the object side, an aperture stop, a first lens with positive refracting power, a second lens with negative refracting power, and a third lens. Both surfaces of the third lens are an aspherical surface in which refracting power varies in accordance with distance from the optical axis in such a way that the both surfaces have a convex shape facing toward the object side in the vicinity of the optical axis and have a concave shape facing toward the object side in the vicinity of the outer circumference, and the following conditions (1) and (2) are satisfied:in-line-formulae description="In-line Formulae" end="lead"?0.1<d5/d6<0.65  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?−0.04<f/f3<0.04  (2)in-line-formulae description="In-line Formulae" end="tail"?where d5is a space distance between the second and third lenses on the optical axis, d6is the thickness of the third lens on the optical axis, f is a focal length of the whole of the wide optical system, and f3is a focal length of the third lens.

REFERENCES:
patent: 7466911 (2008-12-01), Isono
patent: 2004/0150893 (2004-08-01), Shinohara
patent: 2007-047513 (2007-02-01), None
patent: 2007-058153 (2007-03-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4297800