Camera module optical center position measuring method and system

Abstract

The invention discloses a camera module optical center position measuring method and system; the method comprises the following steps: mounting a tested camera module on a clamp, moving the clamp so as to enable the lens center of the tested camera module to be on a same line with a labeled graph center, wherein the clamp can be translated and rotated, and the labeled graph is right opposite to the clamp; keeping the lens center position of the tested camera module to be unchanged, rotating and adjusting the clamp so as to enable a light-sensitive surface of the tested camera module to be parallel to a plane on which the labeled graph is located, shooting the labeled graph and obtaining an image; measuring the deviation value between the labeled graph center and the image center in the image, i.e., the deviation value between the optical center of the tested camera module and the light-sensitive surface center. The camera module optical center position measuring method and system can measure the optical center position of the tested camera module; the method is more stable and faster in testing when compared with a conventional method.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a method and system for measuring the optical center position of a camera module. Background technique [0002] The position of the optical center of the camera module has a certain influence on the imaging effect, especially for a dual camera module, if the optical center of the lens of the camera module is offset from the center of the photosensitive surface, the image synthesis effect will be deteriorated. Therefore, measuring the optical center position of the camera module becomes a necessary measure. [0003] In the prior art, for the lens manufacturer, the position of the optical center of the lens is measured by the illuminance. The luminance at the optical center is the largest, and the luminance decreases in the form of a ring. Based on this, the optical center position is determined, but this method is affected by the illuminance of the light source The influence of ...

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Problems solved by technology

[0003] In the prior art, for the lens manufacturer, the position of the optical center of the lens is measured by the illuminance. The luminance at the optical center is the largest, and the luminance decreases in the form of a ring. Based on this, the optical center position is determined, but this method is affected by the illuminance of the light source The influence of uniformity, if the uniformity of the light source is not good, there will be a large error

Another method for measuring the position of the optical center of the camera module is to use Zhang Zhengyou to calibrate the optical center, but this method needs to take at least ten images at different positions and angles to ensure stable and accurate test results, and this method consumes It takes a long time and it is difficult to apply to production line inspection

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