Imaging lens system

Details Imaging lens system Imaging lens system

2011-08-16

2011-08-16

Lester, Evelyn A. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S740000, C359S761000

Reexamination Certificate

active

08000036

ABSTRACT:
An imaging lens system in order from the object side to the image side includes a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power and a sixth lens with positive refractive. The imaging lens system satisfies the following formulas: Nd2>1.8 and Vd2<25, where Nd2is the refractive index of the second lens, Vd2is the Abbe number of the second lens.

REFERENCES:
patent: 5786944 (1998-07-01), Hagimori et al.
patent: 7362509 (2008-04-01), Takeuchi

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