The QVE00033 phototransistor optical interrupter switch consists of an infrared LED emitter and a phototransistor detector optically coupled through a 0.4mm aperture on both sides. It is designed to indicate the presence or absence of a vane or shield in the emitter to detector path.
The document describes the Fairchild QVE00033, a surface-mount optical interrupter switch consisting of an infrared LED emitter and a phototransistor detector separated by a slot. It is designed to detect the presence or absence of a vane or shield in the light path with high mechanical sensitivity.
The slot separating the emitter and detector is 2mm wide.
A movement of only 0.4mm causes the detector path to be interrupted.
The forward voltage of the LED is 1.2V.