Encoder disk, SEM

Encoder disk, SEM

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Caption: Encoder disk, coloured scanning electron micrograph (SEM). This is an electro-mechanical part used in robotics, computer peripherals (such as computer mice and track balls) and photographic lenses. It works by translating angular motion of a shaft into digital code. The infrared light emitting diodes (on one side of the encoder) are detected by a sensor on the other. Holes in the disk create pulses of light that vary in frequency. This acts as a feedback mechanism regarding its speed and position. Magnification: x50 when printed 10 centimetres wide.

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Keywords: coloured, computer mouse, device, digital, diodes, disc, electro-mechanical, electronic, electronics, encoder disk, encoding disk, engineering, equipment, false-coloured, feedback mechanism, information, infrared, ir, led, leds, light-emitting diode, optical, part, photodetectors, photographic lens, photosensitive, physical, physics, position, robotics, rotary encoder, scanning electron micrograph, scanning electron microscope, sem, shaft encoder, speed, technological, technology, tracker, tracking

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