Optical lens assembly for image taking

a technology of optical lens and assembly, applied in the field of optical lens assembly for image taking, can solve the problems of difficult improvement of aberration correction, reduced so as to reduce the total length of optical lens assembly, and improve the effect of aberration correction and modulation transfer function
US20120140339A1Active Publication Date: 2012-06-07LARGAN PRECISION
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
LARGAN PRECISION
Publication Date
2012-06-07

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Abstract

An optical lens assembly for image taking, sequentially from an object side to an image side along an optical axis comprises: the first lens element with refractive power, a bi-convex second lens element with positive refractive power, the third lens element with negative refractive power having a concave object-side surface and a convex image-side surface, the fourth lens element with positive refractive power having a convex object-side surface and a concave image-side surface. All four lenses may be made of plastic with bi-aspherical surfaces. Additionally, the optical lens assembly for image taking satisfies conditions to shorten the total length and reduce the sensitivity in order to achieve the goal of a fine aberration correction and ready for its use in cameras and camera mobile phones.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an optical lens assembly for image taking, and more particularly to an optical lens assembly composed of four lenses and applied to an electronic product, and the optical lens assembly has the features of short total length and low cost.

[0003] 2. Description of the Related Art

[0004] As science and technology advance, the development of electronic products such as digital still cameras, web cameras, and mobile phone cameras comes with an optical lens assembly with a smaller size and a lower cost to meet user requirements, while providing an optical lens assembly with good aberration correction capability, high resolution, and high image quality.

[0005] In general, a conventional optical lens assembly for image taking for a mini electronic product has different designs including the two-lens, three-lens, four-lens, and five-or-more lens designs. If the image quality is taken in consideration, ...

Claims

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