Imaging lens

Details Imaging lens Imaging lens

2007-06-13

2010-02-02

Spector, David N (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

C359S716000

Reexamination Certificate

active

07656593

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. This imaging lens comprises a first junction type compound lens14, an aperture diaphragm S, a second junction type compound lens16, and a third junction type compound lens18, wherein the first junction type compound lens, the aperture diaphragm, the second junction type compound lens, and the third junction type compound lens are arranged in this sequence from an object side to an image side. The first junction type compound lens comprises a first lens, a second lens and a third lens arranged in this sequence from the object side to the image side, the second junction type compound lens comprises a fourth lens, fifth lens and a sixth lens arranged in this sequence from the object side to the image side, and the third junction type compound lens comprises a seventh lens, an eighth lens and a ninth lens arranged in this sequence from the object side to the image side. The first lens, the third lens, the fourth lens, the sixth lens, the seventh lens and the ninth lens are formed of a curable resin material, and the second lens, the fifth lens and the eighth lens are formed of a high softening temperature glass material.

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Japanese International Search Report dated Jul. 10, 2007, (PCT/JP2007/061875).

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