Optical detection device and optical detection method for side wall of inner cavity of mobile phone camera bracket

Abstract

The invention relates to an optical detection device and an optical detection method for the side wall of an inner cavity of a mobile phone camera bracket. The optical detection system comprises a to-be-detected platform, a control unit and an optical assembly, the optical assembly comprises an area-array camera, a telecentric lens and a coaxial light source; one end of the telecentric lens is fixedly installed on the area-array camera, and the other end of the telecentric lens is connected with the coaxial light source in a matched mode. The to-be-detected platform is provided with a positioning boss which passes through a camera shooting circular hole of the mobile phone camera bracket to realize positioning. The optical assembly is arranged at the inclined upper part of the to-be-detected platform and shoots the inner cavity side wall vertical to the bottom surface of the inner cavity of the mobile phone camera bracket from the inclined upper part; the incident light of the optical assembly and the bearing plane form a light incident angle alpha. According to the invention, the influence caused by the positioning boss can be reduced to the greatest extent, and the optical assembly can be ensured to shoot a clear and complete picture of the side wall of the inner cavity of the mobile phone camera bracket, so that the detection accuracy is effectively improved, and the omission ratio is reduced.

Description

technical field [0001] The invention relates to the field of optical detection, in particular to an optical detection device and an optical detection method for the inner cavity side wall of a mobile phone camera bracket. Background technique [0002] With the continuous improvement of living standards, smart phones have gradually become popular in everyone's hands. With the rapid development of the mobile phone industry, it has also brought mass production of mobile phone camera brackets. In the production process of mobile phone camera brackets, it is inevitable to produce various appearance defects, such as bumps, scratches, burrs, etc. For these appearance defects, it is often necessary to screen out products with appearance defects through appearance inspection in the production of mobile phone camera brackets. [0003] At present, the screening of appearance defects of mobile phone camera brackets often requires a lot of manpower to identify defective products with t...

AI Technical Summary

Problems solved by technology

When the optical component shoots the side wall of the inner cavity (that is, the surface to be tested), since the positioning boss is higher than the bottom surface of the inner cavity, the following problems are easily caused during shooting: 1) The side wall of the inner cavity cannot be photographed Intact (obscured by locating bosses); 2) No clear picture of lumen sidewalls available

The most difficult of these is the inability to obtain a clear picture of the side walls of the lumen

Because the clarity of the picture directly affects the accuracy of detection and the rate of missed detection

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