Imaging optical system for camera and video telephony camera...

Details Imaging optical system for camera and video telephony camera... Imaging optical system for camera and video telephony camera...

2011-03-29

2011-03-29

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S718000

Reexamination Certificate

active

07916402

ABSTRACT:
An imaging optical system for a camera and a video telephony camera employing the imaging optical system. The imaging optical system includes a stop and a first lens that are sequentially arranged from an object side. The first lens has a positive refractive power and two convex aspherical surfaces and satisfies LB/f>0.88 and LT/LB<1.71 wherein LTis the distance along the optical axis from the stop to the image plane of the imaging optical system, f is the total focal length of the imaging optical system, and LBis the distance along the optical axis between the surface of the first lens facing the image side and the image plane of the imaging optical system.

REFERENCES:
patent: 6297915 (2001-10-01), Kaneko et al.
patent: 6560037 (2003-05-01), Dou
patent: 1020030015130 (2003-02-01), None

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