Image pickup lens

Details Image pickup lens Image pickup lens

2007-02-13

2007-02-13

Sugarman, Scott J. (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S708000, C359S773000

Reexamination Certificate

active

11256877

ABSTRACT:
An image pickup lens can form an excellent optical image on a compact image pickup element having a large number of pixels. The image pickup lens includes, sequentially from the object side, an optical aperture, a first lens made of glass and having at least a spherical surface at the object side and a positive refracting power, a second lens made of resin and having two a spherical surfaces and a negative refracting power, a third lens made of glass and having at least a spherical surface at the object side and a positive refracting power, and a fourth lens made of resin and having two a spherical surfaces and a negative refracting power.

REFERENCES:
patent: 4758074 (1988-07-01), Yamakawa
patent: 6747810 (2004-06-01), Sato
patent: 7012765 (2006-03-01), Matsui et al.
patent: 7035023 (2006-04-01), Nanba et al.
patent: 7079330 (2006-07-01), Lee et al.

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