Lens device and imaging apparatus

Details Lens device and imaging apparatus Lens device and imaging apparatus

2007-10-10

2008-11-11

Sugarman, Scott J (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C359S785000

Reexamination Certificate

active

07450322

ABSTRACT:
An image capture lens includes, in order and from a side of an object, a first positive lens having a convex surface facing the object, an aperture diaphragm, a second negative lens having a convex surface facing an image, a third positive lens having a concave surface facing the image, and an IR cut filter. The three lenses, aperture diaphragm, and IR cut filter are formed of resin materials, all the lens surfaces except for the IR cut filter are aspheric, and Conditional Equations (A0) to (A2) are satisfied. (A0) 0.3<f/f1<1.5, (A1) −9<f/|f2|×100 <−0.9, and (A2) 0.3<D2/D3<0.5, where f: focal distance of the whole system, f1: focal distance of the first lens, f2: focal distance of the second lens, D2: distance from the first lens to aperture diaphragm, and D3: distance from aperture diaphragm to the second lens.

REFERENCES:
patent: 7167323 (2007-01-01), Isono
patent: 7262925 (2007-08-01), Huang
patent: 2007/0242369 (2007-10-01), Huang et al.
patent: 2001-272598 (2001-10-01), None
patent: 2004-302058 (2004-10-01), None
patent: 2005-258181 (2005-09-01), None
patent: 2005-309210 (2005-11-01), None
patent: 2007-316375 (2007-12-01), None
JPO Office Action, App. No. 2006-281004, May 16, 2008 (2 pages).

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