Optical Image Pick-up Lens
An optical image pick-up lens (1, 2, 3, 4) includes an aperture (ST), a first lens (L1), a second lens (L2), a third lens (L3), a fourth lens (L4), and a fifth lens (L5) in order along an optical axis (Z) from an object side toward an image side. The first lens (L1) is a positive plastic biconvex lens, the second lens (L2) is a negative plastic meniscus lens, the third lens (L3) is a positive plastic meniscus lens, the fourth lens (L4) is a positive glass meniscus lens, and the fifth lens (L5) is a plastic lens. All the surfaces (S2-S11) of the first to the fifth lenses (L1-L5) are aspheric surfaces. A refractive index of the fourth lens (L4) is greater than 1.7. The fifth lens (L5) gradually changes from negative to positive from a center, where the optical axis (Z) passes through, to an edge.
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Published patent application
Disclosure date: 11-06-2014
Publication date: 01-13-2016
Applicant: CALIN TECHNOLOGY CO LTD, TW
Inventor: HSU SHU-CHUAN, TW
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