Shaft-mounted detector for optical encoder

摘要

A transmissive optical encoder is disclosed. The transmissive optical encoder includes a detector, a code wheel, and an emitter. The detector includes an aperture through the detector. The aperture is configured to receive a rotary shaft of a motor. The code wheel is coupled to the rotary shaft of the motor. Rotation of the rotary shaft results in corresponding rotation of the code wheel. The emitter is configured to emit a light signal through the code wheel toward the detector. Rotation of the code wheel results in modulation of the light signal at the detector. Embodiments of the transmissive optical encoder consume relatively little space and facilitate alignment of the emitter and detector.

主权项

1. An apparatus comprising:
a detector of a transmissive optical encoder, the detector comprising:
a circuit substrate comprising an aperture through the circuit substrate, the aperture to receive a rotary shaft of a motor; anda photosensor array coupled directly to a surface of the circuit substrate, the photosensor array located on the circuit substrate at a position to receive a modulated light signal from an emitter through a coding element coupled to the rotary shaft.