

The opening of World War II led to significant expansion as the company produces optics for range finders, bombsights, and reconnaissance systems. A further move to Glenbrook in Connecticut in 1941 was quickly followed by another move to Norwalk, Connecticut, where the company remained until 2000. They incorporated the growing firm on 13 December 1939. Initially, they worked from a small office in Manhattan, but soon opened a production facility in Jersey City. Perkin raised US$15,000 from his relatives, while Elmer added US$5,000, and the firm was initially set up as a partnership on 19 April 1937.

The two struck up a friendship over their shared interest in astronomy, and eventually came up with the idea of starting a firm to produce precision optics. Charles Elmer ran a firm that supplied court reporters and was nearing retirement when he attended one of Perkin's lectures on astronomy being held at the Brooklyn Institute of Arts and Sciences. Still interested in the sciences, he gave public lectures on various topics.

Richard Perkin was attending the Pratt Institute in Brooklyn to study chemical engineering, but left after a year to try his hand on Wall Street.
