Optical lens system for taking image

Optical: systems and elements – Lens – Multiple component lenses

Reexamination Certificate

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Details

C359S715000

Reexamination Certificate

active

07660049

ABSTRACT:
An optical lens system for taking image comprises four lens elements with refractive power, from the object side to the image side: a first meniscus lens element with negative refractive power; a second lens element with positive refractive power having a convex object-side and a convex image-side surface; a third lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a fourth lens element with positive refractive power having a convex object-side surface and a concave image-side surface; and an aperture stop located between the object and the second lens element. The above arrangements effectively reduce the volume of the optical lens system while providing a relatively high resolution.

REFERENCES:
patent: 7095570 (2006-08-01), Amanai

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