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Optical photographing system

An optical and relational technology, applied in optics, optical components, instruments, etc., can solve the problems of not being able to meet the requirements of high-end camera lens modules, shrinking the pixel size of photosensitive components, and difficult bonding process of glass lenses, etc., to achieve high lens production yield , increase the wide field of view and shorten the total optical length

Active Publication Date: 2014-06-11
LARGAN PRECISION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the advancement of process technology and the trend of thinner and lighter electronic products, the pixel size of photosensitive components is continuously shrinking, and the system has higher requirements for imaging quality. The common three-piece lens group can no longer meet the needs of higher-end camera lens modules.
[0005] U.S. Patent No. 7,365,920 discloses a four-piece lens group, in which the first lens and the second lens are bonded to each other by two glass spherical mirrors to form a Doublet (doublet lens) to eliminate chromatic aberration, but this method has its disadvantages First, the configuration of too many glass spherical mirrors leads to insufficient freedom of the system, which makes it difficult to shorten the total optical length of the system; second, the bonding process of glass lenses is not easy, which is easy to cause difficulties in manufacturing

Method used

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Embodiment Construction

[0056] Please refer to the optical photography system of the first embodiment of the present invention Figure 1A , for the aberration curve of the first embodiment, please refer to Figure 1B , the optical photography system of the first embodiment includes sequentially from the object side to the image side:

[0057] A first lens 110 with negative refractive power is made of plastic, the object side surface 111 of the first lens 110 is convex, and the image side surface 112 is concave, and the object side surface 111 and image side surface 112 of the first lens 110 are are all aspheric;

[0058] A second lens 120 with positive refractive power is made of plastic. The object side surface 121 of the second lens 120 is convex, and the image side surface 122 is convex. In addition, the object side surface 121 and the image side surface 122 of the second lens 120 are all aspheric;

[0059] A third lens 130 with positive refractive power is made of plastic. The object side surfa...

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PUM

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Abstract

The invention discloses an optical photographing system, comprising a first lens, a second lens, a third lens and a fourth lens from an object side to an image side, wherein the first lens has a negative bending force; the surface of the first lens at the object side is a convex surface and the surface of the first lens at the image side is a concave surface; the second lens has a positive bending force; the third lens has a positive bending force; the surface of the third lens at the object side and the surface of the third lens at the image side are non-spherical surfaces; the four lens has a negative bending force, the surface of the fourth lens at the image side is a concave surface and at least one of the surface of the fourth lens at the object side and the surface of the fourth lens at the image side is a non-spherical surface. Four lenses with the bending force are arranged in the system. A lens distance between the first lens and the second lens is T12, the entire focus distance of the optical shooting system is f, and the centre thickness of the first lens is CT1. The optical photographing system further comprises a diaphragm. A distance between the diaphragm and an imaging surface on an optical axis is SL, and a distance between the surface of the first lens at the object side and the imaging surface on the optical axis is TTL. The following relations are satisfied: 0.1

Description

technical field [0001] The invention relates to a miniaturized four-chip optical photography 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, and the photosensitive components of general camera lenses are nothing more than Charge Coupled Devices (CCD) or complementary There are two types of Complementary Metal-Oxide Semiconductor Sensor (CMOS Sensor), and due to the advancement of semiconductor process technology, the pixel area of ​​the photosensitive component is reduced, and the miniaturized camera lens is gradually developing into the high-pixel field. Therefore, for imaging Quality requirements are also increasing. [0003] Traditional miniaturized camera lenses mounted on portable electronic products mostly adopt a three-piece lens structure. The lens system is sequentially composed of a first lens wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B13/18G02B13/00G02B13/06G02B1/04
Inventor 陈俊杉黄歆璇
Owner LARGAN PRECISION
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