Quality inspection method, device and computer storage medium of fixed-focus camera module

Abstract

The invention provides a quality detection method, device and computer storage medium of a fixed-focus camera module, the method comprising: obtaining M test images obtained by the fixed-focus camera module by photographing test chart cards at different object distances, Determine the imaging quality parameters of N test areas in each test image; draw the defocus curve corresponding to each test area based on the imaging quality parameters of N test areas in each test image in M ​​test images, a total of N Defocus curve, the abscissa of each defocus curve is the object distance when shooting, and the ordinate is the imaging quality parameter of the corresponding area; based on N-1 defocus curves corresponding to N-1 surrounding areas and the object distance and distance The conversion relationship between them determines the inclination of the fixed-focus camera module lens; based on the conversion relationship between the N defocus curves and the object distance and the distance, the field curvature of the fixed-focus camera module lens is determined; based on the inclination and field curvature, Check the quality of the fixed-focus camera module.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a quality inspection method, device and computer storage medium of a fixed-focus camera module. Background technique [0002] A fixed-focus camera module with integrated lens and base produced by AA (Active Alignment) technology, in the production process, affected by manufacturing, assembly technology or process, the lens and image chip in the camera module There is often a non-parallel situation between them. When such a camera module is working, there will be a defocus phenomenon, resulting in blurred images and poor image quality. Therefore, it is necessary to carry out effective quality inspection on the quality of the camera module of this model before leaving the factory. Contents of the invention [0003] Embodiments of the present invention provide a quality detection method, device and computer storage medium for a fixed-focus camera module, which are used to eff...

AI Technical Summary

Problems solved by technology

[0002] A fixed-focus camera module with integrated lens and base produced by AA (Active Alignment) technology, in the production process, affected by manufacturing, assembly technology or process, the lens and image chip in the camera module There are often non-parallel situations between them. When such a camera module is working, it will appear out of focus, resulting in blurred images and poor image quality.

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