Infrared light filter

An infrared light and filter technology, applied in the field of filters, can solve problems such as deformation or deterioration, and achieve the effect of improving image quality

Inactive Publication Date: 2020-03-06
PLATINUM OPTICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the infrared light absorbing resin film is easily deformed or deteriorated in a high-temperature environment

Method used

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Embodiment Construction

[0032] Figure 1A is a schematic cross-sectional view of an infrared light filter according to an embodiment of the present invention. see Figure 1A , the infrared filter 100 includes a light-absorbing film 110 and a first optical film 121 , wherein the first optical film 121 is formed on one side of the light-absorbing film 110 , that is, the light-absorbing film 110 and the first optical film 121 are stacked on each other. The first optical film 121 may be an anti-reflection layer or an interference filter film. When the first optical film 121 is an anti-reflection layer, the first optical film 121 can reduce the reflectivity of the infrared filter 100, wherein the first optical film 121 can be a multilayer film or a sub-wavelength structure (sub-wavelength structure) . When the first optical film 121 is an interference filter film, the first optical film 121 can enhance the ability to filter out invisible light (such as infrared light or ultraviolet light).

[0033] The ...

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Abstract

An infrared light filter includes a light absorption film and a first optical film. The light absorption film includes a binding material and a plurality of infrared light absorbing particles. The infrared light absorbing particles are distributed in the binding material and are all inorganic materials. The average agglomerated particle size of the infrared light absorbing particles is less than 80 nm. The first optical film is formed on one side of the light absorption film. The thickness of the infrared light filter is between 10 microns and 500 microns, and the infrared light cut-off wavelength of the infrared light filter is between 600 nm and 650 nm. The infrared light filter has an average transmittance of less than 1% in the range of 700 nm to 110 nm, and an average transmittance ofmore than 75% in the range of 430 nm to 580 nm.

Description

technical field [0001] The invention relates to an optical element, in particular to an optical filter. Background technique [0002] Most of the current mobile devices, such as smart phones and tablet computers, have been equipped with image sensors, so that the mobile devices have the function of image capture. The aforementioned image sensor is usually a Complementary Metal-Oxide-Semiconductor (CMOS) image sensor (CMOS Image Sensor, CIS), which is a chip package. The response wavelength (wavelength of response) of the CMOS chip of the CMOS image sensor covers not only visible light, but also infrared light and ultraviolet light. In order to prevent the infrared light and ultraviolet light from interfering with the image captured by the image sensor, a general image sensor is equipped with a filter to filter out unnecessary infrared light and ultraviolet light. [0003] Generally speaking, there are two kinds of infrared light filters installed in the image sensor: one i...

Claims

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Application Information

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IPC IPC(8): G02B5/20G02B5/22
CPCG02B5/208G02B5/22G02B5/223
Inventor 吕中汉陈彦甫陈哲宇叶素敏欧俊尧谢峻诚
Owner PLATINUM OPTICS TECH
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