WHEC

WHEC is a Sino-Japanese joint venture with 26-year experience of developing, manufacturing and selling contact image sensor(CIS), specializing in customization of CIS for machine vision system, AOI, surface inspection. What is a Contact image sensor(CIS)? A CIS scanner is a compact line scan camera which is mounted directly above the object under inspection. It is the same type camera used in many fax or document scanners. The CIS consists of a row of silicon photodiodes, a graded index (GRIN) lens array and a light source. What can a CIS do? Line scan, used in machine vision system for document processing, PCB inspection, web inspection, metal foil inspection, battery film inspection, cloth inspection, textile and apparel inspection, etc. Why CIS? More compact and simple to mount, only 5mm~20mm to scanning objects Simple to adjust, resistant to vibration, no multi camera alignment problems Constant picture angle over the total reading width No distortion by the lens Clearl...