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Optical imaging lens group

An optical imaging and lens group technology, applied in optics, optical components, lenses, etc., can solve problems such as manufacturing difficulties, insufficient system freedom, and difficult glass lens manufacturing process, and achieve shortened total length, good imaging quality, and reduced system sensitivity degree of effect

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] Commonly seen high-resolution photographic lenses mostly use a front aperture and four-piece lens group, wherein the first lens and the second lens are usually bonded with two glass spherical mirrors to form a doublet lens (Doublet). 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 bonding of glass lenses The manufacturing process is not easy, causing difficulties in manufacturing

Method used

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Examples

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no. 1 example

[0082] Please refer to the schematic diagram of the optical system of the first embodiment of the present invention Figure 1A , please refer to the aberration curve of the first embodiment Figure 1B . The optical imaging lens group of the first embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0083] A first lens 100 with positive refractive power, its object side surface 101 is convex and image side surface 102 is concave, its material is glass, the object side surface 101 and image side surface 102 of the first lens 100 are both aspherical ;

[0084] A second lens 110 with negative refractive power, its object side surface 111 is concave and image side surface 112 is convex, its material is plastic, the object side surface 111 and image side surface 112 of the second lens 110 are both aspherical ;

[0085] A third lens 120 with positive refractive power, its object-side surface 121 is convex and image-side...

no. 2 example

[0117] Please refer to the schematic diagram of the optical system of 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 lens group of the second embodiment is mainly composed of four lenses, which include sequentially from the object side to the image side:

[0118] A first lens 200 with positive refractive power, its object-side surface 201 is convex and image-side surface 202 is concave, and its material is glass. The object-side surface 201 and image-side surface 202 of the first lens 200 are both aspherical ;

[0119] A second lens 210 with negative refractive power, the object side surface 211 is concave and the image side surface 212 is convex, the material is plastic, the object side surface 211 and the image side surface 212 of the second lens 210 are both aspherical ;

[0120] A third lens 220 with positive refractive power, its object-side surface 221 is ...

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Abstract

The invention discloses an optical imaging lens group sequentially comprising a first lens of positive refractive power, a second lens, a third lens of positive refractive power, a fourth lens, a first diaphragm and a second diaphragm from an object side to an image side, wherein the surface of the object side of the first lens is a convex side; the surface of the object side of the second lens is a concave side; the surface of the object side of the fourth lens is a convex side, and the surface of the image side of the fourth lens is a concave side; the first diaphragm is arranged between the first lens and the second lens; and the second diaphragm is arranged between the second lens and the fourth lens. By means of the lens group configuration way, the total length of the lens can be effectively shortened, the system sensitivity can be lowered, and favorable imaging quality can be obtained.

Description

technical field [0001] The invention relates to an optical imaging mirror group; in particular, it relates to a miniaturized optical imaging mirror group applied to portable 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 element of general photographic lenses is nothing more than a charge coupled device (CCD) or a complementary metal oxide semiconductor There are two types of components (Complementary Metal-Oxide Semiconductor Sensor, CMOS Sensor), and with the improvement of semiconductor process 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 small appearance. Therefore, miniaturized photographic lenses with good imaging quality have become the mainstream in the current market. [0003...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B13/18G02B13/22G02B1/04G02B3/02
Inventor 黄歆璇汤相岐
Owner LARGAN PRECISION
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