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Optical lens group

An optical lens and lens technology, which is applied in the field of optical lens groups, can solve the problems of high sensitivity and long total length of the second positive lens that cannot be improved

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

AI Technical Summary

Problems solved by technology

However, this method leads to a longer overall length of the system, and cannot improve the problem of high sensitivity of the second positive lens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example 》

[0116] Please refer to the first embodiment of the present invention Figure 1A , please refer to the aberration curve of the first embodiment Figure 1B . The optical lens group of the first embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0117] A first lens 110 with positive refractive power, its object-side surface 111 is convex and image-side surface 112 is concave, its material is plastic, the object-side surface 111 and image-side surface 112 of the first lens 110 are both aspherical ;

[0118] A second lens 120 with positive refractive power, the object side surface 121 is concave and the image side surface is convex 122, its material is plastic, the object side surface 121 and image side surface 122 of the second lens 120 are both aspherical ;

[0119] A third lens 130 with negative refractive power, its object-side surface 131 is concave and image-side surface 132 is convex, its material is plastic,...

no. 2 example 》

[0145] 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 optical lens group of the second embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0146] A first lens 210 with positive refractive power, its object side surface 211 is convex and image side surface 212 is concave, its material is plastic, the object side surface 211 and image side surface 212 of the first lens 210 are both aspherical ;

[0147] A second lens 220 with positive refractive power, its object-side surface 221 and image-side surface are convex 222, its material is plastic, the object-side surface 221 and image-side surface 222 of the second lens 220 are both aspherical ;

[0148] A third lens 230 with negative refractive power, its object side surface 231 is concave and image side surface 232 is convex, its material is plastic, the ob...

no. 3 example 》

[0168] 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 optical lens group of the third embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0169] A first lens 310 with positive refractive power, its object side surface 311 is concave and image side surface 312 is convex, its material is plastic, the object side surface 311 and image side surface 312 of the first lens 310 are both aspherical ;

[0170] A second lens 320 with positive refractive power, its object side surface 321 is concave and image side surface 322 is convex, its material is plastic, the object side surface 321 and image side surface 322 of the second lens 320 are both aspherical ;

[0171] A third lens 230 with negative refractive power, its object side surface 331 is concave and image side surface 332 is convex, its material is plasti...

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Abstract

The invention discloses an optical lens group. The optical lens group sequentially comprises a fist lens of positive inflective power, a second lens of positive inflective power, a third lens of negative inflective power and a fourth lens of positive inflective power from an object side to an image side, wherein the object side surface of the third lens is a concave surface, the image side surface of the third lens is a convex surface, and at least one of the object side surface and the image side surface is an aspheric surface; the object side surface and the image side surface of the fourth lens are both aspheric surfaces; and the four lenses with inflective power are provided in the optical lens group.

Description

technical field [0001] The invention relates to an optical lens group; in particular, it relates to a miniaturized optical lens group 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 is increasing day by day. The photosensitive element of a general camera lens is nothing more than a charge coupled device (Charge Coupled Device, CCD) or a complementary metal oxide semiconductor sensor (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor). 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. Traditional miniaturized camera lenses mounted on portable electronic products mostly adopt a three-piece lens structure. The lens system ...

Claims

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Application Information

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IPC IPC(8): G02B13/18G02B13/00G02B1/04G02B3/02
Inventor 许志文黄歆璇
Owner LARGAN PRECISION
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