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Photographic optical lens group

An optical lens and lens technology, applied in the field of miniaturized photographic optical lens sets, can solve the problems of difficult manufacturing, insufficient system freedom, and difficult glass lens manufacturing process, and achieve the effect of reducing the size of the lens and achieving high resolution.

Active Publication Date: 2012-03-14
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing miniaturized photographic lenses with high resolution mostly use four-piece lens groups, among which, the first lens and the second lens are usually bonded with two glass spherical mirrors to form a doublet lens (Doublet) to eliminate chromatic aberration , as shown in U.S. Patent No. 7,365,920, but 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 Not easy, causing difficulties in manufacturing

Method used

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Examples

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no. 1 example

[0112] Please refer to the schematic diagram of the first embodiment of the photographic optical lens group of the present invention Figure 1A , for the aberration curve of the first embodiment, please refer to Figure 1B . The photographic optical lens group of the first embodiment is mainly composed of four lenses, which sequentially include from the object side to the image side:

[0113] 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 ;

[0114] A second lens 120 with negative refractive power, its object-side surface 121 and image-side surface 122 are concave, its material is plastic, the object-side surface 121 and image-side surface 122 of the second lens 120 are both aspherical ;

[0115] A third lens 130 with positive refractive power, its object side surface 131 is c...

no. 2 example

[0145] Please refer to the schematic diagram of the second embodiment of the photographic optical lens group of the present invention Figure 2A , for the aberration curve of the second embodiment, please refer to Figure 2B . The photographic optical lens group of the second embodiment is mainly composed of four lenses, which sequentially include from the object side to the image side:

[0146] A first lens 210 with positive refractive power, its object-side surface 211 and image-side surface 212 are convex, 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 negative refractive power, its object-side surface 221 and image-side surface 222 are concave, 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 positive refractive power, its object side surface 231 is concave...

no. 3 example

[0172] Please refer to the schematic diagram of the third embodiment of the photographic optical lens group of the present invention Figure 3A , for the aberration curve of the third embodiment, please refer to Figure 3B . The photographic optical lens group of the third embodiment is mainly composed of four lenses, which sequentially include from the object side to the image side:

[0173] A first lens 310 with positive refractive power, its object-side surface 311 and image-side surface 312 are convex, its material is plastic, the object-side surface 311 and image-side surface 312 of the first lens 310 are both aspherical ;

[0174] A second lens 320 with negative refractive power, its object-side surface 321 and image-side surface 322 are concave, its material is plastic, the object-side surface 321 and image-side surface 322 of the second lens 320 are both aspherical ;

[0175] A third lens 330 with positive refractive power, its object side surface 331 is concave an...

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Abstract

The invention discloses a photographic optical lens group which comprises the following parts from an object side to an image side: a first lens with positive refracting power, wherein an object side surface of the first lens is a convex surface; a second lens with negative refracting power, wherein both an object side surface and an image side surface of the second lens are recessed surfaces; a third lens with positive refracting power, wherein an object side surface of the third lens is a recessed surface and an image side surface of the third lens is a convex surface; a fourth lens, wherein both an object side surface and an image side surface of the fourth lens are aspheric surfaces. The photographic optical lens group also is provided with an aperture and an electrical sensor. The aperture is provided between a shot object and the first lens. The electrical sensor is provided at an imaging surface part for image formation of the shot object, and a quantity of lenses with negativerefracting power in the photographic optical lens group is four. Through a configuration mode of the above lens group, a lens volume can be effectively reduced, and high image interpreting power is obtained.

Description

technical field [0001] The invention relates to a photographic optical lens set, in particular to a miniaturized photographic optical lens set 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 semiconductor elements. (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor) two types, and with the advancement of semiconductor manufacturing technology, the pixel size of the photosensitive element has been reduced, and today's electronic products are developing with good functions and thin, light and short appearance. Therefore, miniaturized photographic lenses with good imaging quality have become the mainstream in the current market. [0003] Exis...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/22G02B13/18
Inventor 汤相岐陈俊杉黄歆璇
Owner LARGAN PRECISION
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