Lens module detection system and detection method thereof

Abstract

The invention relates to a lens module detection system. The detection system is used to detect the dip angle between a lens barrel and the movable barrel of a voice coil motor in the lens module. The detection system comprises a light source device and an analysis device, wherein the light source device contains a light source and a position recording device; the light source is used to emit a laser beam into the gap between the lens barrel and the movable barrel of the voice coil motor; the emitted laser beam is reflected to the position recording device by the outer side wall of the lens barrel, and a light spot is formed on the recording device; the position recording device records the position of the light spot; the analysis device is used to analyze whether the relative offset of the light spot to the laser beam sending position of the light source is in the an allowed error range; and the lens module detection system is utilized to detect the dip angle between the lens barrel and the voice coil motor in the lens module. Therefore, the product quality of the lens module can be increased.

Description

technical field [0001] The invention relates to a lens module detection system and a detection method thereof. Background technique [0002] In recent years, with the development of optical products, the scope of application of lens modules continues to expand, such as digital cameras, mobile phones with camera functions and other electronic products. For electronic products, especially consumer electronic products, the development trend is light weight and thinner, and the corresponding lens modules are getting smaller and smaller, and the requirements for precision are getting higher and higher, so The assembly process of lens modules also requires higher precision and stability to ensure production efficiency and yield. However, during the assembly process, due to misalignment or product tolerances, after the lens module is screwed into the movable barrel of the voice coil motor, there will be more or less gaps between the lens module and the movable barrel. There is a ...

AI Technical Summary

Problems solved by technology

However, during the assembly process, due to misalignment or product tolerances, after the lens module is screwed into the movable barrel of the voice coil motor, there will be more or less gaps between the lens module and the movable barrel. There is a certain inclination angle, but the size of the inclination angle is difficult to measure with conventional angle measuring devices, and whether the inclination angle is within the allowable error range must be measured before judging

If the inclination angle is too large, the focus of the lens module will be out of focus, which will affect the product quality

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