SFR test equipment and test method thereof

Abstract

SFR test equipment and a test method thereof are disclosed. The equipment comprises a target plate, a light source, a base station and an image acquisition system. The target plate is a full field-of-view SFR target plate and is formed by a plurality of inclined black square blocks and a plurality of inclined white square blocks which are intersected. The light source is arranged in front of or behind the target plate. The base station supports a camera module group. The image acquisition system is connected to the camera module group so that an initial image of the target plate is transmittedto the image acquisition system. According to each knife edge inclination angle, an edge spread function (ESF) and a line spread function (LSF) are calculated. And finally, a SFR value of resolutionpower of the camera module group is determined.

Description

technical field [0001] The present invention relates to a camera module test equipment, in particular to an SFR test equipment and its test method, wherein a full field of view SFR target plate, an image detection and recognition technology, an inefficiency loss self-adaptive rotation angle compensation technology, a local Adaptive image enhancement technology and a technology for calculating the inclination angle of the knife edge to obtain an SFR value for judging the camera module. Background technique [0002] With the growing market of smart phones, mobile phone camera modules are gradually developing towards high pixels, and people have more and more demands for mobile phones, and it is common for each person to hold a smart phone. Among them, The camera contained in the smart phone is an important function, and most people are more accustomed to using the camera of the mobile phone instead of the general traditional camera to record life and directly share it to the I...

AI Technical Summary

Problems solved by technology

At present, the resolution of camera modules needs to be tested during the production process. It is also a recognized method in the industry to evaluate the resolution of camera modules through general SFR. However, traditional test methods are affected by factors such as image rotation, noise, and ambient brightness in the actual production line. It has a great influence, and the corresponding positioning points need to be set in the test card, which limits the sharing of multiple stations in the production line, and is not conducive to the mass use of manufacturers on the production line.

Images