Aspherical type imaging lens array

Details Aspherical type imaging lens array Aspherical type imaging lens array

2007-02-27

2007-02-27

Schwartz, Jordan M. (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S738000

Reexamination Certificate

active

11255320

ABSTRACT:
An aspherical type imaging lens array comprises, from object side to image side, at least an aperture, a first positive meniscus lens with a convex surface facing the object side, a second meniscus lens with a convex surface facing the image side, and a third lens meniscus lens with a convex surface facing the object side. The respective lenses are made of plastic and has two aspherical surfaces, a focal length of the aspherical type imaging lens array is f, a focal length of the second lens is f2, and a focal length of the third lens is f3, they satisfy the equation: −0.20<f/f2<0.15, and −0.25<f/f3<0.20.

REFERENCES:
patent: 6961191 (2005-11-01), Sato
patent: 7064905 (2006-06-01), Murakami et al.

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