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Infrared lens, camera module and electronic device

An infrared lens and camera module technology, applied in optical components, optics, instruments, etc., can solve the problems of weak infrared light source brightness and poor imaging quality, and achieve the effect of improving imaging effects, aberrations, and imaging quality.

Inactive Publication Date: 2020-05-01
NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Existing infrared lenses generally filter out the influence of visible light on imaging by setting infrared filters, and only obtain infrared light for imaging. However, because the brightness of infrared light sources is generally relatively weak, resulting in poor imaging quality

Method used

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  • Infrared lens, camera module and electronic device
  • Infrared lens, camera module and electronic device
  • Infrared lens, camera module and electronic device

Examples

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no. 1 example

[0053] see Figure 1 to Figure 4 , from the object side to the image side, the infrared lens 10 sequentially includes a stop STO, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4 and an infrared filter L5.

[0054] The stop STO is disposed on the object side S1 of the first lens L1.

[0055] The first lens L1 has a positive refractive power and is made of plastic. The object side S1 is convex, and the image side S2 is concave, both of which are aspherical. The second lens L2 has positive refractive power and is made of plastic. The object side S3 is convex, and the image side S4 is concave at the optical axis and convex at the circumference, both of which are aspherical. The third lens L3 has a positive refractive power and is made of plastic. The object side S5 is concave at the optical axis and convex at the circumference, and the image side S6 is convex at the optical axis and concave at the circumference. Aspherical. The fourth lens L4 has a positive...

no. 2 example

[0064] see Figure 5 to Figure 8 , from the object side to the image side, the infrared lens 10 sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4 and an infrared filter L5.

[0065] The stop STO is disposed on the image side S2 of the first lens L1.

[0066] The first lens L1 has a positive refractive power and is made of plastic. The object side S1 is convex, and the image side S2 is concave, both of which are aspherical. The second lens L2 has positive refractive power and is made of plastic. The object side S3 is convex, and the image side S4 is concave at the optical axis and convex at the circumference, both of which are aspherical. The third lens L3 has a positive refractive power and is made of plastic. The object side S5 is concave at the optical axis and convex at the circumference, and the image side S6 is convex at the optical axis and concave at the circumference. Aspherical. The fourth lens L4 has a positive ...

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Abstract

The invention discloses an infrared lens, a camera module and an electronic device. According to the embodiment of the invention, the infrared lens sequentially comprises a first lens, a second lens,a third lens and a fourth lens from an object side to an image side. The first lens, the second lens, the third lens and the fourth lens all have positive refractive power, and the infrared lens meets the following conditional expression: abbe(vd)<35, wherein abbe(vd) is the maximum Abbe number of the first lens to the fourth lens. According to the infrared lens, the camera module and the electronic device in the embodiment of the invention, through reasonable lens configuration, the conditional expression abbe(vd)<35 is met, the infrared lens has a large aperture, the light inlet amount canbe increased, and the sensitivity of the infrared lens can be reduced, so that the infrared lens has good imaging quality.

Description

technical field [0001] The invention relates to optical imaging technology, in particular to an infrared lens, a camera module and an electronic device. Background technique [0002] Existing infrared lenses generally filter out the influence of visible light on imaging by setting infrared filters, and only obtain infrared light for imaging. However, because the brightness of infrared light sources is generally relatively weak, resulting in poor imaging quality. Contents of the invention [0003] In view of this, embodiments of the present invention provide an infrared lens, a camera module and an electronic device. [0004] The infrared lens according to the embodiment of the present invention includes a first lens, a second lens, a third lens and a fourth lens in sequence from the object side to the image side, the first lens, the second lens, the third lens and the The fourth lens has a positive refractive power, and the infrared lens satisfies the following conditiona...

Claims

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Application Information

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IPC IPC(8): G02B13/14G02B13/18
CPCG02B13/004G02B13/008
Inventor 周祥禾李宗政陈冠宏肖德塘林君翰詹明山
Owner NANCHANG OUFEI BIOLOGICAL IDENTIFICATION TECH
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