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SFR test equipment and test method thereof

A technology of testing equipment and testing methods, which is applied in the fields of TV, electrical components, image communication, etc., and can solve the problems of restricting multi-station sharing of production lines and unfavorable manufacturers for mass use.

Active Publication Date: 2018-01-30
NINGBO SUNNY OPOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • SFR test equipment and test method thereof
  • SFR test equipment and test method thereof

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Embodiment Construction

[0036] The following description serves to disclose the present invention to enable those skilled in the art to carry out the present invention. The preferred embodiments described below are only examples, and those skilled in the art can imagine other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents and other technical solutions without departing from the spirit and scope of the present invention.

[0037] It can be understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element The quantity can be multiple, and the term "a" cannot be understood as a limitation on the quantity.

[0038] Such as figure 1 Shown is an SFR testing device according to a preferred embodiment of the present invention, which is used...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N17/00
Inventor 廖海龙黄宇张胜马江敏
Owner NINGBO SUNNY OPOTECH CO LTD
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