Method and system for testing batch focus of camera modules

Abstract

The invention is applicable to the field of optical imaging testing, and provides a method and system for testing batch focus of camera modules. The method comprises the following steps: controlling camera modules of a training group to perform an automatic focus test, performing learning training according to the focus test data, and establishing a relationship model between an MTF curve and themotor positions; controlling camera modules of a verification group to perform an automatic focus test to verify whether the relationship model passes the standard rate; if not, updating the relationship model according to the focus test data of the verification group; if so, controlling camera modules of a test group to perform a single focus test, predicting the optimal motor position by the single focus test data and the relationship model, and verifying the MTF curve of the optimal motor position. The method and system for testing batch focus of camera modules select a small amount of testdata in the early stage of the batch test to establish a relationship model through the neural network, and use the relationship model to predict the batch test of the optimal focus positions, whichgreatly reduces the sampling test points of the batch test and improves the test efficiency.

Description

technical field [0001] The invention belongs to the field of optical imaging testing, in particular to a camera module batch focusing testing method and system. Background technique [0002] At present, the optical imaging system represented by the camera module is a necessary component of smart phones, camcorders, drone aerial photography, automotive electronics and other application fields. According to market demand, most of the current camera modules are equipped with auto-focus function. Auto-focus refers to the process of changing the object distance and distance position through the focus mechanism (motor) in the camera to make the image of the object being photographed clear. In order to facilitate the use of customers, during the production process of the camera module with auto focus function, according to the needs of end customers, the motor position corresponding to the clearest image captured by the camera module needs to be saved in the memory of the camera mo...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method and system for batch focus testing of camera modules, aiming to solve the problem of low production test efficiency caused by a large number of repeated test sampling points for batch focus tests of existing camera modules

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