Photographic lens system

A technology of camera lens and lens, which is applied in the parts of TV system, image communication, TV, etc., can solve the problem of not being able to meet the needs of camera lens modules, and achieve the effects of shortening the total optical length, improving imaging quality, and increasing photosensitive sensitivity

Active Publication Date: 2011-03-30
LARGAN PRECISION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional miniaturized photographic lenses mounted on mobile phone cameras, as shown in U.S. Patent No. 7,365,920, mostly adopt a four-piece lens structure; In the case of continuous improvement of system imaging quality requirements, the known four-piece lens group will not be able to meet...

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Examples

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no. 1 example

[0085] Please refer to the first embodiment of the present invention figure 1 , for the aberration curve of the first embodiment, please refer to figure 2 . The imaging lens system of the first embodiment is mainly composed of five lenses, which include in sequence from the object side to the image side:

[0086] A first lens 100 with positive refractive power, its object-side surface 101 is convex and image-side surface 102 is concave, and its material is plastic. The object-side surface 101 and image-side surface 102 of the first lens 100 are both non- sphere;

[0087] A second lens 110 with negative refractive power, its object-side surface 111 is convex and image-side surface 112 is concave, and its material is plastic. The object-side surface 111 and image-side surface 112 of the second lens 110 are both non- sphere;

[0088] A third lens 120 with negative refractive power, its object-side surface 121 is convex and image-side surface 122 is concave, and its material ...

no. 2 example

[0118] Please refer to the second embodiment of the present invention image 3 , for the aberration curve of the second embodiment, please refer to Figure 4 . The imaging lens system of the second embodiment is mainly composed of five lenses, which sequentially include from the object side to the image side:

[0119] A first lens 300 with positive refractive power, its object-side surface 301 is convex and image-side surface 302 is concave, and its material is plastic. The object-side surface 301 and image-side surface 302 of the first lens 300 are non- sphere;

[0120] A second lens 310 with negative refractive power, its object-side surface 311 is convex and image-side surface 312 is concave, and its material is plastic. The object-side surface 311 and image-side surface 312 of the second lens 310 are both non- sphere;

[0121] A third lens 320 with positive refractive power, its object-side surface 321 is convex and image-side surface 322 is concave, and its material i...

no. 3 example

[0145] Please refer to the third embodiment of the present invention Figure 5 , for the aberration curve of the third embodiment, please refer to Figure 6 . The imaging lens system of the third embodiment is mainly composed of five lenses, which sequentially include from the object side to the image side:

[0146] A first lens 500 with positive refractive power, its object side surface 501 is convex and image side surface 502 is concave, its material is plastic, the object side surface 501 and image side surface 502 of the first lens 500 are both non- sphere;

[0147] A second lens 510 with negative refractive power, its object-side surface 511 is convex and image-side surface 512 is concave, and its material is plastic. The object-side surface 511 and image-side surface 512 of the second lens 510 are non- sphere;

[0148] A third lens 520 with positive refractive power, its object-side surface 521 is convex and image-side surface 522 is concave, and its material is plas...

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Abstract

The invention provides a photographic lens system, which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a diaphragm from an object side to an image side, wherein the first lens has positive refractive power, and the surface of the object side of the first lens is a convex surface; the second lens has negative refractive power; the surface of the image side of the third lens is a concave surface; the fourth lens has the positive refractive power; the fifth lens has the negative refractive power, the surface of the image side of the fifth lens is a concave surface, and at least one surface of the fifth lens has at least one inflexion point; and the diaphragm is arranged between the photographed object and the third lens. In the photographic lens system, the optical axis distance between the first lens and the second lens is T12, the focal distance of the whole photographic lens system is f, and the following formula is met: the product of (T12/f) and 100 is more than 0.5 and less than 15. In the invention, through the configuration, system aberration can be effectively corrected to improve imaging quality, the total optical length of the photographic lens system can be effectively shortened, and the system has the characteristic of broad vision angle.

Description

technical field [0001] The present invention relates to a camera lens system, in particular to a camera lens system applied to a mobile phone camera. Background technique [0002] In recent years, with the rise of mobile phone cameras, the demand for miniaturized photographic lenses has been increasing, and the photosensitive elements of general photographic lenses are nothing more than photocoupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductors (Complementary Metal-Oxide Semiconductor, CMOS), and due to the advancement of semiconductor process technology, the pixel area of ​​the photosensitive element is reduced, and the miniaturized photographic lens is gradually developing into the high-pixel field. Therefore, the requirements for imaging quality are also increasing. [0003] Traditional miniaturized photographic lenses mounted on mobile phone cameras, as shown in U.S. Patent No. 7,365,920, mostly adopt a four-piece lens structure; In th...

Claims

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Application Information

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IPC IPC(8): G02B13/00H04N5/225
Inventor 陈俊杉
Owner LARGAN PRECISION
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