Subminiature imaging optical system

Details Subminiature imaging optical system Subminiature imaging optical system

2011-01-25

2011-01-25

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Single component with multiple elements

C359S796000, C359S718000

Reexamination Certificate

active

07876511

ABSTRACT:
There is provided an imaging optical system including: a first lens element having a convex object-side surface; a second lens element having an object-side planar surface in contact with an image-side surface of the first lens element and an image-side planar surface; and a third lens element having an object-side surface in contact with an image-side surface of the second lens element, wherein the object-side surface of the first lens element and an image-side surface of the third lens element are aspherical, and the third lens element has a point of inflection formed within an effective aperture thereof such that the image-side surface is convexed toward an image plane at a central portion to have positive refractive power and concaved toward the image plane at a peripheral portion to have negative refractive power.

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patent: 2001-324609 (2001-11-01), None
patent: 10-2005-0093755 (2005-09-01), None

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