Imaging lens

Details Imaging lens Imaging lens

2007-02-06

2009-06-09

Collins, Darryl J (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S771000

Reexamination Certificate

active

07545587

ABSTRACT:
The imaging lens is configured to include, in an order arranged from an object side: a first lens having a substantially convex surface formed at the object side and having a positive refractive power; a second lens constituted of a meniscus lens having a substantially concave surface formed at the object side and having a negative refractive power; a third lens having substantially convex surfaces formed at both sides, respectively; and a fourth lens constituted of a meniscus lens having a substantially convex surface at the object side and having a positive refractive power. Further, a space of at least 1.0 mm is ensured between the first lens and the second lens. This allows a diaphragm mechanism of a certain thickness having a diaphragm to be arranged between the first lens and the second lens.

REFERENCES:
patent: 5677798 (1997-10-01), Hirano et al.
patent: 6813099 (2004-11-01), Yamaguchi
patent: 2006/0132933 (2006-06-01), Nio et al.
patent: 2006/0158743 (2006-07-01), Nio et al.
patent: 2000-180719 (2000-06-01), None
patent: 2002-365531 (2002-12-01), None
patent: 2004-053813 (2004-02-01), None
patent: 2004-102234 (2004-04-01), None

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