Image pickup lens and image pickup apparatus

Optical: systems and elements – Lens – Multiple component lenses

Reexamination Certificate

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Reexamination Certificate

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07907353

ABSTRACT:
An image pickup lens includes: a first lens having a positive refracting power; an aperture stop for adjusting the amount of light; a second lens having a concave face directed to the object side and having a negative refracting power; a third lens having a concave face directed to the object side and having a positive refracting power; and a fourth lens having a negative refracting power; the first lens, aperture stop, second lens, third lens, and fourth lens being disposed in order from the object side.

REFERENCES:
patent: 2005/0046970 (2005-03-01), Amanai
patent: 2008/0043343 (2008-02-01), Chen et al.
patent: 2008/0266676 (2008-10-01), Yasuhiko
patent: 05-040220 (1993-02-01), None
patent: 2002-365529 (2002-12-01), None
patent: 2004-341512 (2004-12-01), None
patent: 2005-208236 (2005-08-01), None
patent: 2005-292559 (2005-10-01), None
patent: 2007-155868 (2007-06-01), None
patent: 2007-212878 (2007-08-01), None
patent: 2008-033376 (2008-02-01), None
Bellingham+Stanley Technical Bulletin, R007, “Dispersion, light sources and Abbe Number”,Mar. 13, 2007, pp. 1-2.
European Search Report issued Oct. 28, 2009 for corresponding European Application No. 09 25 1471.

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