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Image capturing lens system, imaging device and mobile terminal

A lens group and lens technology, applied in optical components, optics, instruments, etc., can solve the problems of unsatisfactory peripheral image resolution and illumination, and cannot meet the high-level imaging quality.

Active Publication Date: 2015-04-15
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the commonly used four-element lens group often fails to achieve a good balance between the large viewing angle and the total length of the lens, and the resolution and illumination of the surrounding images are not ideal, and it has not yet met the high-level imaging required in the field. quality

Method used

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  • Image capturing lens system, imaging device and mobile terminal
  • Image capturing lens system, imaging device and mobile terminal
  • Image capturing lens system, imaging device and mobile terminal

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example 》

[0109] Please refer to the first embodiment of the present invention Figure 1A , Please refer to the aberration curve of the first embodiment Figure 1B . The image capturing device of the first embodiment includes an image pickup system lens group and an electronic photosensitive element 180. The image pickup system lens group is mainly composed of four refractive lenses, from the object side to the image side sequentially including:

[0110] A first lens 110 with positive refractive power, the material of which is plastic, the object side 111 is convex at the near optical axis, the image side 112 is convex at the near optical axis, and both surfaces are aspherical;

[0111] A second lens 120 with negative refractive power is made of plastic, its object side 121 is concave at the near optical axis, its image side 122 is concave at the near optical axis, and both surfaces are aspherical, and its image The side surface 122 has at least one convex surface off-axis;

[0112] A third le...

no. 2 example 》

[0141] Please refer to the second embodiment of the present invention Figure 2A , Please refer to the aberration curve of the second embodiment Figure 2B . The image capturing device of the second embodiment includes an image pickup system lens group and an electronic photosensitive element 280. The image pickup system lens group is mainly composed of four refractive lenses, from the object side to the image side including:

[0142] A first lens 210 with positive refractive power, the material of which is plastic, the object side surface 211 is concave at the near optical axis, the image side surface 212 is convex at the near optical axis, and both surfaces are aspherical;

[0143] A second lens 220 with negative refractive power, which is made of plastic, its object side 221 is concave at the near optical axis, its image side 222 is concave at the near optical axis, and both surfaces are aspherical, and its image The side surface 222 has at least one convex surface off-axis;

[0...

no. 3 example 》

[0155] Please refer to the third embodiment of the present invention Figure 3A , Please refer to the aberration curve of the third embodiment Figure 3B . The image capturing device of the third embodiment includes an image pickup system lens group and an electronic photosensitive element 380. The image pickup system lens group is mainly composed of four refractive lenses, from the object side to the image side including:

[0156] A first lens 310 with positive refractive power, the material of which is plastic, the object side surface 311 is convex at the near optical axis, the image side surface 312 is convex at the near optical axis, and both surfaces are aspherical;

[0157] A second lens 320 with negative refractive power is made of plastic, its object side surface 321 is concave at the near optical axis, its image side surface 322 is concave at the near optical axis, and both surfaces are aspherical, and its image The side surface 322 has at least one convex surface off-axis...

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Abstract

An image capturing lens system includes, in order from an object side to an image side, a first lens element, a second lens element, a third lens element and a fourth lens element. The first lens element with positive refractive power has a convex image-side surface in a paraxial region thereof. The second lens element has negative refractive power. The third lens element with positive refractive power has a concave object-side surface in a paraxial region thereof and a convex image-side surface in a paraxial region thereof. The fourth lens element with refractive power has a concave image-side surface in a paraxial region thereof, wherein an object-side surface and the image-side surface of the fourth lens element are aspheric, and the image-side surface thereof has at least one convex shape in an off-axis region thereof. The image capturing lens system has a total of four lens elements with refractive power.

Description

Technical field [0001] The present invention relates to an image pickup system lens group, in particular to an image pickup system lens group applied to portable electronic products. Background technique [0002] As personal electronic products become thinner and lighter, the internal components of the electronic products are required to have smaller sizes. The size of the photographic lens also faces the requirement of miniaturization under this trend. In addition to the requirements for miniaturization, because the advancement of semiconductor manufacturing technology has reduced the pixel area of ​​the photosensitive element, the photographic lens is gradually developing in the field of high pixels, and therefore, the requirements for image quality are also increasing. [0003] Traditionally, miniaturized optical systems mounted on portable electronic products mostly use three-piece lens structures. However, due to smart phones (Smart Phone), tablet computers (Tablet PC) and we...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/18G02B13/00
CPCG02B13/004
Inventor 许伯纶林振诚谢东益陈纬彧
Owner LARGAN PRECISION
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