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Telecentric lens in the application of fiber optic conductor defect detection

by:Fugen      2020-10-14
Machine vision is to use machines to replace human eyes do measurement and judgment. Subject target is obtained by image acquisition system, the shape of the information, according to the pixel distribution and brightness, color and other information, converted to digital signal; Image system for various operation these signals to extract the characteristics of the target, and according to the results of determination to control the scene of the equipment. The complete image acquisition system includes a light source, camera, lens, lens is the key of the imaging device, therefore the choice of industrial camera is also important. In some visual inspection, we will encounter image distortion, cannot achieve higher sharpness, distortion, reflective and other issues, the ordinary industrial lens and light source at the time of shooting, and cannot effectively solve the problem, it's for the telecentric lens industry. Telecentric lens with unique optical design, the main characteristics in the depth of field range magnification is consistent, won't appear the phenomenon of nearly coscodl, high resolution, large depth of field and low distortion without distortion, improve the detection accuracy. For example when doing optical conductor cylinder surface defect detection in, double telecentric lens is used. Than artificial with a magnifying glass before testing, not only take clear, accurate test results, and improve the efficiency, save the cost of manpower. Telecentric lens also can be applied to machine vision detection more cases, such as precision parts inspection, mobile phone screen, etc.
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