Non-Contact Dimensional Measurements by Optical and Electronic Techniques

Accurate dimensional measurements of products during processing are a major requirement in many industries. Because of high heat radiation, rapid motion, or other factors a noncontact measurement system is desirable. Systems have been developed using a combination of closed-circuit television and special optical techniques together with special purpose computers and associated readout devices. A typical application is a system for measuring the length of red hot steel I-beam blanks.