Coaxial synchronous automatic focus light box mechanism of camera module

Abstract

The invention discloses a coaxial synchronous automatic focus light box mechanism of a camera module. The coaxial synchronous automatic focus light box mechanism is mainly composed of a motor, a transmission shaft, a lamp box inside which is fixedly provided with a shot object, a focusing fixed seat capable of fixing the camera module and first and second transmission belts. When focusing, the motor drives the transmission shaft to rotate; the transmission shaft drives the first and second transmission belts to synchronously rotate; the first and second transmission belts respectively drive the focusing fixed seat and the lamp box which are connected with the transmission belts to realize the synchronous rotation of the camera module fixed on the focusing fixed seat and the shot object fixed in the lamp box; and when focusing, the camera module can automatically rotate under the actions of the motor, the transmission shaft and the first transmission belt, the disadvantage that the manual focusing capacity is insufficient is substituted, and the synchronous rotation of the shot object and the camera module can effectively prevent the picture shot by the camera module from rotating, and a position that the software captures the MTF (modulation transfer function) value cannot be changed, so that the software can more accurately capture the MTF value, and focusing is more accurate.

Description

technical field [0001] The invention relates to a partial mechanism of an automatic focusing device of a camera module, in particular to a mechanism capable of synchronously rotating the camera module and an object to be photographed during a focusing test. Background technique [0002] With the development of productivity and the rapid development of technology, camera technology is also developing rapidly, and the requirements for camera quality and performance are getting higher and higher. Each camera module has a certain focal length, that is, there is an optimal imaging surface. When shooting an object, the best imaging effect can be obtained by placing the photoreceptor on the optimal imaging surface, that is, the best shooting effect. During the production process of the camera module, its focal length is not adjusted to the best imaging effect, so it is necessary to test and adjust the camera module to adjust its focal length to achieve the best imaging effect. [...

AI Technical Summary

Problems solved by technology

Chinese patent ZL200620034488.0 discloses a camera module focusing test device, which can fix the camera module, and drive the lens to rotate through the rotation of the knob and the transmission of the gear, so as to realize the focus. The manual operation has obvious advantages, but it is not fully automated, and the device structure is relatively complicated

Moreover, since the lens rotates during focusing and the subject does not move, it will cause the image captured by the lens to rotate, and the software captures the position change of the MTF value (modulation transfer function value), which makes the focusing not accurate enough

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