Imaging lens

Details Imaging lens Imaging lens

2007-08-29

2010-11-09

Choi, William C (Department: 2873)

Optical: systems and elements

Lens

With multipart element

Reexamination Certificate

active

07830619

ABSTRACT:
An imaging lens of which optical performance does not deteriorate even in a high temperature environment, various aberrations are well corrected, optical length is short, and back focus is sufficiently secured; the imaging lens comprising: an aperture stop S; and a junction type compound lens14having a positive refractive power, characterized in that the aperture stop and the compound lens are arranged in this sequence from an object side to an image side. The junction type compound lens comprises a first lens L1, a second lens L2and a third lens L3, arranged in this sequence from the object side to the image side. The first lens and the third lens are formed of a curable resin material, and the second lens is formed of a high softening temperature optical glass material. The first lens and the second lens are bonded with adhesive, and the second lens and the third lens are bonded with adhesive. The object side face of the first lens and the image side face of the third lens are aspherical.

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European International Search Report dated May 12, 2009.
Chinese Office Action issued in Chinese Application No. 200780001204.5, dated May 11, 2010.

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