Optical: systems and elements – Lens – Including a nonspherical surface
Reexamination Certificate
2007-04-17
2007-04-17
Sugarman, Scott J. (Department: 2873)
Optical: systems and elements
Lens
Including a nonspherical surface
C359S566000, C359S661000
Reexamination Certificate
active
11018711
ABSTRACT:
An image pick-up lens system includes an aperture stop (10), a first lens (20), and a second lens (30) having a concave surface on an object side. The aperture stop, the first lens and the second lens are aligned in that order from the object side to an image side. The first lens has positive refracting power and has a diffraction grating formed on a convex surface on the image side. The second lens has positive refracting power. The system satisfies the following condition: (1) 1.4<T/f<1.7, wherein f is a focal length of the system, and T is a length from the aperture stop to an image pick-up surface (50) of the image side. Condition (1) limits the total length of the system in order to provide compactness. The system also satisfies other conditions (2)–(5) as disclosed, in order to provide compactness, cost-effectiveness and improved optical performance.
REFERENCES:
patent: 6055105 (2000-04-01), Boku et al.
patent: 6191889 (2001-02-01), Maruyama
patent: 6297915 (2001-10-01), Kaneko et al.
patent: 6449105 (2002-09-01), Dou
patent: 6992838 (2006-01-01), Park
patent: 7027234 (2006-04-01), Kim et al.
patent: 7038861 (2006-05-01), Ninomiya et al.
patent: 2003/0117709 (2003-06-01), Nakamura et al.
patent: 2003/0117723 (2003-06-01), Shinohara
patent: 2004/0036983 (2004-02-01), Ninomiya et al.
patent: 0819952 (1998-01-01), None
patent: 1357414 (2003-10-01), None
patent: WO 96/17265 (1995-11-01), None
Jin Guo-Fan
Wang Min-Qiang
Wang Zhuo
Yan Ying-Bai
Zeng Ji-Yong
Hon Hai Precision Industry Co. Ltd.
Morris Manning & Martin LLP
Sugarman Scott J.
Tsinghua University
Xia, Esq. Tin Tingkang
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