The OPB610 and OPB620 sloted optical switches consist of an infrared emiting diode and an NPN silicon phototransistor with an enhanced low current roll-of to improve contrast ratio and immunity to background irradiance. Optical switching represents a fundamental technological evolution, shifting data routing from the domain of electrons to the realm of photons, or light. This is achieved using a patent pending opto-mechanical configuration and activated via an electrical control. Optical switches, which control the path of light signals without converting them to electrical signals, offer significant advantages in terms of speed, bandwidth, and efficiency.