Lens system

Details Lens system Lens system

2008-05-06

2009-10-20

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S717000

Reexamination Certificate

active

07605990

ABSTRACT:
A lens system includes a first lens and a second lens formed in turn from an object side to an image side. The lens system satisfies the following conditions:in-line-formulae description="In-line Formulae" end="lead"?0.08≦D2/D≦0.14  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?4≦h2/z2≦12  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein,D2is the distance along an optical axis of the lens system from the second surface of the first lens to the third surface of the second lens,D is the distance along an optical axis of the lens system from the first surface of the first lens to fourth surface of the second lens,h2is the distance from the optical axis of the lens system to the outermost optically effective portion of the second lens surface of the first lens, andz2is the distance along the optical axis of the lens system from the vertex of the second surface of the first lens to the point of the optical axis where h2is measured.

REFERENCES:
patent: 2008/0074760 (2008-03-01), Sato

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