Optical photographic system

A camera system and optical technology, applied in the field of miniaturized optical camera system, can solve problems such as manufacturing difficulties, lack of system freedom, and difficult glass lens manufacturing process, and achieve good imaging quality, large viewing angle, and shortened overall length.

Active Publication Date: 2012-05-23
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing high-resolution photographic lenses use a front aperture and four-piece lens group. Among them, the first lens and the second lens are usually bonded with two glass spherical mirrors to form a doublet to eliminate chromatic aberration, such as As shown in US Patent No. 7,365,920, this method has its disadvantages. First, too many spherical mirror configurations make the system less free, which makes the total optical length of the system difficult to shorten. Second, the manufacturing process of glass lens bonding is not easy. cause difficulties in manufacturing

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no. 1 example

[0099] 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 optical imaging system of the first embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0100] A first lens 110 with negative 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 , and both the object-side surface 111 and the image-side surface 112 of the first lens 110 are provided with at least one inflection point;

[0101] A second lens 120 with positive refractive power, its object-side surface 121 and image-side surface 122 are convex, its material is plastic, the object-side surface 121 and image-side surface 122 of the second lens 120 are both aspherical ;

[0102] A third lens 130...

no. 2 example

[0129]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 imaging system of the second embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0130] A first lens 210 with negative 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 , and both the object-side surface 211 and the image-side surface 212 of the first lens 210 are provided with at least one inflection point;

[0131] A second lens 220 with positive refractive power, its object-side surface 221 is concave and image-side surface 222 is convex, its material is plastic, the object-side surface 221 and image-side surface 222 of the second lens 220 are both aspherical ;

[0132] A t...

no. 3 example

[0153] 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 imaging system of the third embodiment is mainly composed of four lenses, which sequentially include from the object side to the image side:

[0154] A first lens 310 with negative refractive power, its object side surface 311 is convex and image side surface 312 is concave, its material is plastic, the object side surface 311 and image side surface 312 of the first lens 310 are both aspherical , and both the object-side surface 311 and the image-side surface 312 of the first lens 310 are provided with at least one inflection point;

[0155] A second lens 320 with positive refractive power, its object-side surface 321 and image-side surface 322 are convex, its material is plastic, and the object-side surface 321 and image-side surface 322 of the second lens 320 are both aspherical ;

[0156] A third len...

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Abstract

The invention discloses an optical photographic system, which comprises four lenses with refracting power, sequentially comprising a first lens, a second lens with a positive refracting power, a third lens with a negative refracting power and a forth lens with a positive refracting power from the object side to the image side, wherein at least one of an object side surface and an image side surface of the second lens is an aspheric surface; an object side surface of the third lens is a concave surface; an image side surface of the third lens is a convex surface; the object side surface and the image side surface of the third lens are aspheric surfaces respectively; an object side surface and an image side surface of the fourth lens are aspheric surfaces respectively; and the optical photographic system also comprises an aperture which is arranged between an photographed object and the second lens. In the configuration mode of the lens group, the total length of the lenses can be effectively shortened, a wider viewing angle is provided and favorable imaging quality can be obtained.

Description

technical field [0001] The invention relates to an optical camera system; in particular, it relates to a miniaturized optical camera system applied to electronic products. Background technique [0002] In recent years, with the vigorous development of miniaturized photographic lenses, the demand for miniature imaging modules is increasing day by day, and the photosensitive elements of general photographic lenses are nothing more than charge coupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductors. There are two types of components (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and with the improvement of semiconductor manufacturing process technology, the pixel size of the photosensitive element is reduced, and today's electronic products are developed with good functions and thin, light and small appearance. Therefore, miniaturized photographic lenses with good imaging quality have become the mainstream in the current market. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/22G02B13/06G02B1/04G02B3/02
Inventor 陈俊杉蔡宗翰黄歆璇
Owner LARGAN PRECISION
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