Zygo Corp. of Middlefield, Conn., has announced that CEO J. Bruce Robinson will retire when a successor is named, which is expected to happen during the second half of the fiscal year. Robinson, who has led the company for more than 10 years, will become a Zygo consultant. Chairman Bruce Worster and board member Carol Wallace will lead the board in the CEO search and selection process. Zygo is a supplier of optical metrology instruments, precision optics, and electro-optical design and manufacturing services to the semiconductor capital equipment and industrial markets.