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Image capturing lens system, imaging device and mobile terminal

An image pickup and lens group technology, applied in optical components, optics, instruments, etc., can solve the problems of poor resolution and illumination of surrounding images, and high-level imaging quality that cannot be met.

Active Publication Date: 2015-04-29
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 》

[0108] Please refer to the first embodiment of the present invention Figure 1A , for the aberration curve of the first embodiment, please refer to Figure 1B . The imaging device of the first embodiment includes an image pickup system lens group and an electronic photosensitive element (170). The image pickup system lens group is mainly composed of four lenses with refractive power, and sequentially includes from the object side to the image side:

[0109] A first lens 110 with positive refractive power is made of plastic, its object side 111 is convex at the near optical axis, its image side 112 is concave at the near optical axis, and both sides are aspherical;

[0110] A second lens 120 with positive refractive power is made of plastic, its object side 121 is convex at the near optical axis, its image side 122 is convex at the near optical axis, and both sides are aspherical;

[0111] A third lens 130 with negative refractive power is made of plastic, its object side 131 ...

no. 2 example 》

[0140] Please refer to the second embodiment of the present invention Figure 2A , for the aberration curve of the second embodiment, please refer to Figure 2B . The image pickup device of the second embodiment includes an image pickup system lens group and an electronic photosensitive element 270. The image pickup system lens group is mainly composed of four lenses with refractive power, and sequentially includes from the object side to the image side:

[0141] A first lens 210 with positive refractive power is made of plastic, its object side 211 is convex at the near optical axis, its image side 212 is concave at the near optical axis, and both sides are aspherical;

[0142] A second lens 220 with positive refractive power is made of plastic, its object side 221 is convex at the near optical axis, its image side 222 is convex at the near optical axis, and both sides are aspherical;

[0143] A third lens 230 with negative refractive power is made of plastic, its object si...

no. 3 example 》

[0154] Please refer to the third embodiment of the present invention Figure 3A , for the aberration curve of the third embodiment, please refer to Figure 3B . The imaging device of the third embodiment includes an image pickup system lens group and an electronic photosensitive element 370. The image pickup system lens group is mainly composed of four lenses with refractive power, and sequentially includes from the object side to the image side:

[0155] A first lens 310 with positive refractive power is made of plastic, its object side 311 is convex at the near optical axis, its image side 312 is concave at the near optical axis, and both sides are aspherical;

[0156] A second lens 320 with positive refractive power is made of plastic, its object side 321 is concave at the near optical axis, its image side 322 is convex at the near optical axis, and both surfaces are aspherical;

[0157] A third lens 330 with negative refractive power is made of plastic, its object side 3...

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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 has refractive power. The second lens element with positive refractive power has a convex image-side surface in a paraxial region thereof. The third lens element with negative 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 both of an object-side surface and the image-side surface thereof 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 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] With the gradual thinning of personal electronic products, the internal components of electronic products are required to have a smaller size. Under this trend, the size of photographic lenses is also facing the requirement of miniaturization. In addition to the requirement for miniaturization, because the progress of semiconductor manufacturing technology has reduced the pixel area of ​​the photosensitive element, the photographic lens is gradually developing into the field of high pixel, so the requirements for imaging quality are also increasing. [0003] Traditional miniaturized optical systems mounted on portable electronic products mostly use a three-piece lens structure. The popularity of high-standard portable devices (Mobile Terminal) has led to a rapid increase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18G02B13/06
CPCG02B13/004G02B13/06G02B13/18
Inventor 陈纬彧
Owner LARGAN PRECISION
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