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Optical imaging system

An optical imaging system and image-side technology, applied in optics, optical components, instruments, etc., can solve problems such as manufacturing difficulties, insufficient system freedom, and difficulty in shortening the total length of the system, so as to reduce the size of the lens, reduce the sensitivity of the system, High Resolution Effects

Active Publication Date: 2012-05-16
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 manufacturing process of glass lens bonding is not easy, and it is easy to cause manufacturing difficulties.

Method used

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Examples

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no. 1 example

[0091] 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 sequentially include from the object side to the image side:

[0092] 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 ;

[0093] A second lens 120 with negative refractive power, its object side surface 121 is convex and image side surface 122 is concave, its material is plastic, the object side surface 121 and image side surface 122 of the second lens 120 are both aspherical ;

[0094] 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 pla...

no. 2 example

[0121] 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:

[0122] 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 ;

[0123] A second lens 220 with negative refractive power, its object side surface 221 is convex and image side surface 222 is concave, its material is plastic, the object side surface 221 and image side surface 222 of the second lens 220 are both aspherical ;and

[0124] A third lens 230 with positive refractive power, its object side surface 231 is concave and image side surface 232 is convex, its material...

no. 3 example

[0145] 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:

[0146] A first lens 310 with positive 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 ;

[0147] A second lens 320 with negative refractive power, its object side surface 321 is convex and image side surface 322 is concave, its material is plastic, the object side surface 321 and image side surface 322 of the second lens 320 are both aspherical ;and

[0148] 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...

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Abstract

The invention provides an optical imaging system, which sequentially comprises a first lens with a positive refraction force, a second lens with a negative refraction force, a third lens with a positive refraction force and a fourth lens from an object side to an image side, wherein the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the image side surface of the fourth lens is a concave surface, and at least one of the object side surface and the image side surface of the fourth lens is an aspheric surface; wherein, the optical imaging system is also provided with an aperture and an electronic photographic element for imaging a shot object, wherein the aperture is arranged between the shot object and the first lens; and the optical imaging system has four lenses with refraction forces. By the configuration mode of the lens group, the lens volume can be effectively reduced, the sensitivity of the system is reduced, and high resolving power can be obtained.

Description

technical field [0001] The invention relates to an optical imaging system; in particular, it relates to a miniaturized optical imaging system 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 improvements in manufacturing 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-piece le...

Claims

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Application Information

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