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Optical imaging lens system, image capturing unit and electronic device

A lens system, optical imaging technology, applied in optics, optical components, instruments, etc., can solve the difficulty of taking into account peripheral brightness and imaging quality, viewing angle, lens size and imaging quality. It is difficult to achieve a balance, and it is difficult to meet the basic requirements of imaging question

Active Publication Date: 2018-04-10
LARGAN PRECISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by factors such as material molding and assembly technology, it is not easy to achieve a balance between viewing angle, lens size, and imaging quality. Two-lens and three-lens lenses have been difficult to meet the basic requirements for imaging.
In the traditional four-lens lens, because the distance between the third lens and the fourth lens is too narrow, when the lens is designed to meet the requirements of short overall length and large viewing angle, it is difficult to balance the surrounding brightness and image quality.

Method used

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  • Optical imaging lens system, image capturing unit and electronic device
  • Optical imaging lens system, image capturing unit and electronic device
  • Optical imaging lens system, image capturing unit and electronic device

Examples

Experimental program
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no. 1 example

[0123] Please refer to figure 1 and figure 2 ,in figure 1 A schematic diagram of an imaging device according to a first embodiment of the present invention is shown, figure 2 From left to right are the spherical aberration, astigmatism and distortion curves of the first embodiment. Depend on figure 1 It can be seen that the image capturing device includes an optical imaging lens system (not another number) and an electronic photosensitive element 170 . The optical imaging lens system includes an aperture 100, a first lens 110, a second lens 120, a diaphragm 101, a third lens 130, a fourth lens 140, an infrared filter element (IR-cut) from the object side to the image side in sequence. Filter) 150 and imaging surface 160. Wherein, the electronic photosensitive element 170 is disposed on the imaging surface 160 . The total number of lenses (110-140) in the optical imaging lens system is four.

[0124] The first lens 110 has positive refractive power and is made of plast...

no. 2 example

[0157] Please refer to image 3 and Figure 4 ,in image 3 A schematic diagram of an imaging device according to a second embodiment of the present invention is shown, Figure 4 From left to right are the spherical aberration, astigmatism and distortion curves of the second embodiment. Depend on image 3 It can be seen that the image capturing device includes an optical imaging lens system (not another number) and an electronic photosensitive element 270 . The optical imaging lens system sequentially includes an aperture 200 , a first lens 210 , a second lens 220 , a third lens 230 , a fourth lens 240 , an infrared filter element 250 and an imaging surface 260 from the object side to the image side. Wherein, the electronic photosensitive element 270 is disposed on the imaging surface 260 . The total number of lenses (210-240) in the optical imaging lens system is four.

[0158] The first lens 210 has positive refractive power and is made of glass. The object-side surface...

no. 3 example

[0170] Please refer to Figure 5 and Figure 6 ,in Figure 5 A schematic diagram of an imaging device according to a third embodiment of the present invention is shown, Figure 6 From left to right are the spherical aberration, astigmatism and distortion curves of the third embodiment. Depend on Figure 5 It can be seen that the image capturing device includes an optical imaging lens system (not another number) and an electronic photosensitive element 370 . The optical imaging lens system sequentially includes an aperture 300, a first lens 310, a second lens 320, a diaphragm 301, a third lens 330, a fourth lens 340, an infrared filter element 350 and an imaging surface from the object side to the image side. 360. Wherein, the electronic photosensitive element 370 is disposed on the imaging surface 360 ​​. The total number of lenses (310-340) in the optical imaging lens system is four.

[0171] The first lens 310 has positive refractive power and is made of plastic mater...

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Abstract

The invention discloses an optical imaging lens system, an image capturing unit and an electronic device. An optical imaging 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 an object-side surface being convex in a paraxial region thereof. The second lens element has negative refractive power. The third lens element with positive refractive power has an object-side surface being convex in a paraxial region thereof. The fourthlens element with negative refractive power has an object-side surface being convex in a paraxial region thereof and an image-side surface being concave in a paraxial region thereof, the image-side surface of the fourth lens element has at least one convex critical point in an off-axial region thereof, and the two surfaces thereof are both aspheric. The optical imaging lens system has a total offour lens elements. When certain conditions are met, the optical imaging lens system can simultaneously satisfy the needs of a large viewing angle, miniaturization, and high imaging quality. The invention also discloses an image capturing device having the above optical imaging lens system and an electronic device having the image capturing device.

Description

technical field [0001] The invention relates to an optical imaging lens system, an image pickup device and an electronic device, in particular to an optical imaging lens system and an image pickup device suitable for the electronic device. Background technique [0002] In recent years, with the vigorous development of miniaturized photographic lenses, the demand for miniature imaging modules has increased day by day, and with the advancement of semiconductor technology, the pixel size of photosensitive elements has been reduced. The short appearance is the development trend. Therefore, miniaturized photographic lenses with good imaging quality have become the mainstream in the current market. [0003] With the evolution of technology, the demand for camera functions is also increasing. Due to the miniaturization of camera devices, the requirements for short and long lenses are required. The expected viewing angle is gradually increased, and the requirements for imaging qual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/18
CPCG02B13/004G02B5/005G02B5/208G02B9/34G02B27/0025G02B13/18
Inventor 吴建勳郭子傑
Owner LARGAN PRECISION
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