Imaging lens system and imaging apparatus using the imaging...

Details Imaging lens system and imaging apparatus using the imaging... Imaging lens system and imaging apparatus using the imaging...

2011-06-07

2011-06-07

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S762000

Reexamination Certificate

active

07957074

ABSTRACT:
An imaging lens system is provided an includes: in order from the object side, a first lens which has a negative power; a second lens which has a negative power; a third lens; a fourth lens which has a positive power; a fifth lens; and a sixth lens which has a positive power. The first lens is made of glass, and the second to sixth lenses are made of plastic. At least one lens surface of each of the second to sixth lenses is aspheric, and each of the third lens and the fifth lens is made of a material having an Abbe number of 45 or less at the d-line.

REFERENCES:
patent: 7301578 (2007-11-01), Ohzawa et al.
patent: 2007/0217035 (2007-09-01), Baba
patent: 2006-284620 (2006-10-01), None
patent: 2007-249073 (2007-09-01), None
patent: 2009-92797 (2009-04-01), None
patent: 2009-92798 (2009-04-01), None

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