These encoder assemblies from TT Optek are designed for small shafted motors with a shaft diameter of 2 mm [0.079”] and a minimum length of 3.8 mm [0.150”]. The OPE1275H provides a single channel analog output for speed of rotation while the OPE2275H provides a dual channel analog output for speed and direction of rotation. The output of the OPE1275H provides a rise and fall pulse providing the designer two slopes for each pulse doubling the count capability. The OPE2275H provides quadrature rise and fall pulse patterns providing the design engineer 4 times the pulse per revolution count.
See Photodiodes for photodiode arrays designed for motor encoder and industrial encoder applications.
See Transmissive Switches in IR Sensors for slotted switch type dual channel encoder devices.