Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate
2009-05-23
2011-12-20
Martinez, Joseph (Department: 2873)
Optical: systems and elements
Lens
Including a nonspherical surface
C359S708000
Reexamination Certificate
active
08081393
ABSTRACT:
An optical system comprises three lens elements with refractive power, wherein a first lens element with positive refractive power includes at least one aspheric surface, a second lens element with negative refractive power, and a third lens element with negative refractive power includes at least one aspheric surface, which are mounted orderly from the object side to the image side. By such arrangements, the volume of the lens assembly can be reduced, and can obtain high resolution.
REFERENCES:
patent: 6034824 (2000-03-01), Moon
patent: 7184225 (2007-02-01), Noda
patent: 2005/0275950 (2005-12-01), Kubota et al.
Chen Chun-Shan
Huang Yeo-Chih
Noda Sayuri
Tang Hsiang-Chi
Greece James R
Largan Precision Co., Ltd.
Martinez Joseph
Shia Banger
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