Image pick-up optical lens assembly

An optical lens and lens technology, applied in optics, optical components, instruments, etc., can solve the problems of difficult manufacturing, insufficient system freedom, and difficult glass lens bonding process, and achieve high resolution, reduce the size of the lens, and reduce the size of the system. effect of sensitivity

Active Publication Date: 2012-05-30
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has its disadvantages. First, too many glass spherical mirror configurations make the system less free, which makes it difficult to shorten the total length of the system. Second, the glass lens bonding process is not easy, which is easy to cause difficulties in manufacturing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0080] Please refer to the first embodiment of the present invention Figure 1A , for the aberration curve of the first embodiment, please refer to Figure 1B . The image-taking optical lens group of the first embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0081] A first lens 110 with positive refractive power, its object-side surface 111 and image-side surface 112 are both convex, and its material is plastic;

[0082] A second lens 120 with negative refractive power, the object-side surface 121 is concave and the image-side surface 122 is convex, and its material is plastic;

[0083] A third lens 130 with positive refractive power, its object-side surface 131 is concave and image-side surface 132 is convex, its material is plastic, and the object-side surface 131 and image-side surface 132 of the third lens 130 are non- spherical; and

[0084] A fourth lens 140 with negative refractive power, its object-si...

no. 2 example

[0112] Please refer to the second embodiment of the present invention Figure 2A , for the aberration curve of the second embodiment, please refer to Figure 2B . The image-taking optical lens group of the second embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0113] A first lens 210 with positive refractive power, its object-side surface 211 and image-side surface 212 are both convex, and its material is plastic;

[0114] A second lens 220 with negative refractive power, the object side surface 221 is concave and the image side surface 222 is convex, and its material is plastic;

[0115] A third lens 230 with positive refractive power, its object-side surface 231 is concave and image-side surface 232 is convex, its material is plastic, and the object-side surface 231 and image-side surface 232 of the third lens 230 are non- spherical; and

[0116] A fourth lens 240 with negative refractive power, its objec...

no. 3 example

[0138] Please refer to the third embodiment of the present invention Figure 3A , for the aberration curve of the third embodiment, please refer to Figure 3B . The image-taking optical lens group of the third embodiment is mainly composed of four lenses, which include in sequence from the object side to the image side:

[0139] A first lens 310 with positive refractive power, its object-side surface 311 and image-side surface 312 are both convex, and its material is plastic;

[0140] A second lens 320 with negative refractive power, the object-side surface 321 is concave and the image-side surface 322 is convex, and its material is plastic;

[0141]A third lens 330 with positive refractive power, its object-side surface 331 is concave and image-side surface 332 is convex, its material is plastic, and the object-side surface 331 and image-side surface 332 of the third lens 330 are non- spherical; and

[0142] A fourth lens 340 with negative refractive power, its object sid...

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Abstract

This invention provides an image pick-up optical lens assembly comprising, in order from an object side to an image side: a first lens element with positive refractive power having a convex object-side surface and a convex image-side surface; a second lens element with negative refractive power having a concave object-side surface and a convex image-side surface; a third lens element with positive refractive power having an object-side surface and a convex image-side surface, at least one of the surfaces thereof being aspheric; and a fourth lens element with negative refractive power having a convex object-side surface and a concave image-side surface, at least one of the surfaces thereof being aspheric. The image pick-up optical lens assembly further comprises an aperture stop disposed between an object and the first lens element. Such arrangement facilitates a significant reduction in size and sensitivity of the lens assembly while providing superb image quality with higher resolution.

Description

technical field [0001] The invention relates to an optical lens group for taking images; in particular, it relates to an optical lens group for taking images applied to electronic products. Background technique [0002] In recent years, with the rise of portable electronic products with camera functions, the demand for miniaturized camera lenses has been increasing. The photosensitive element of a general camera lens is nothing more than a photosensitive coupling device (Charge Coupled Device, CCD) or a complementary metal-oxide semiconductor device (Complementary Metal-Oxide Semiconductor Sensor, CMOSSensor). Moreover, due to advances in process technology, the pixel size of the photosensitive element is reduced, and the miniaturized camera lens is gradually developing into the high-pixel field. Therefore, the requirements for imaging quality are also increasing. [0003] Traditional miniaturized camera lenses mounted on portable electronic products mostly adopt a three-pi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/22G02B1/04
CPCG02B13/004
Inventor 蔡宗翰黄歆璇
Owner LARGAN PRECISION
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