Profile: Electro-Optical Products Corp. manufactures custom components & systems with associated electronics for optical modulation & optical scanning systems, portable instruments, and systems-integration. Our products are used in industrial, scientific, medical, aerospace, and military applications. We specialize in resonant optical modulators and resonant optical scanners. Our tuning fork chopper is a fixed frequency electromechanically driven light chopper. Vanes attached to moving tines of a fork modulate a light beam. The chopper operates at the natural resonant frequency established by the effective mass of the moving assembly and the spring constant of the tines. We offer standard and custom polygon scanners that are used in the laser industry for printing & marking, scanning, inspection & measurement, and image projection. Our rotating polygon mirror deflects a beam along a line and in the process, transforms the beam from a static source of light into a moving light source. In the reverse case, a static sensor can be used to scan along a line. Our high quality polygon wheels are manufactured from brass, nickel, aluminum, and copper. Our aluminum polygons are used in bar code readers.