Camera module and preparation method of camera module

Abstract

The invention provides a camera module and a preparation method of the camera module, and relates to the technical field of digital imaging. The camera module comprises a lens, an actuator and an image sensor, wherein the image sensor comprises color light filter piece covered with organic dye component; the organic dye component is prepared by mixing a high molecular material with dye and then adding solvent to be liquid state; the organic dye component is coated on the color filter piece through a coating technique so as to replace the effect of an infrared intercepting filter piece in the traditional camera module, thereby reaching the purpose of improving the camera module, further solving the technical problem of scattering light of the infrared intercepting filter piece in the priorart, and reaching the technical effect of improving the scattering light of the camera module and reducing the brightness of the camera module.

Description

technical field [0001] The invention relates to the technical field of digital imaging, in particular to a camera module and a method for preparing the camera module. Background technique [0002] The camera module mainly consists of three parts: lens, infrared cut filter and image sensor. Among them, the infrared cut-off filter is a kind of optical film that uses precise optical coating technology to alternately coat high and low refractive index optical films on the optical substrate to achieve high transparency in the visible light region (400-630nm), near-infrared (700-1100nm) Cut-off optical filter, which is mainly used in digital imaging fields such as mobile phone cameras, computer built-in cameras, and car cameras, to eliminate the influence of infrared light on CCD or CMOS imaging. [0003] However, in the field of optics, all media have different refractive indices. For example, the refractive index of vacuum is 1, the refractive index of oil is 0.8, and the refra...

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Problems solved by technology

[0003] However, in the field of optics, all media have different refractive indices. For example, the refractive index of vacuum is 1, the refractive index of oil is 0.8, and the refractive index of glass is 1.52. This kind of interaction produces reflection, absorption and penetration, and the reflection phenomenon will cause many optical defects, such as glare, ghosting, color cast and other problems, which will lead to the generation of stray light. Infrared cut filter Optical filters such as light sheets are no exception, and the above problems will also exist.

[0004] In addition, the most widely used camera module is the mobile phone camera module, and the most critical technology of the mobile phone camera module is thinning (that is, lower TTL). However, due to the refractive index of the infrared cut filter, it virtually increases the light entering the image. The path of the sensor increases the height of the camera module, which virtually increases the difficulty of thinning technology

[0005] For the above problems, no effective solutions have been proposed

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