IV.19 - PIN silicon photodiodes?

PIN silicon photodiodes are quantum detectors sensitive to light from UV (200 nm) to near IR (1150 nm), gamma radiation, X-rays and charged particles. Photodiodes operate by the absorption of photons or charged particles which generates a flow of current in an external circuit. Photodiodes can be used to detect the presence or absence of small quantities of light and can be calibrated to measure the intensity of light extremely accurately. They can also be used for optical position sensing to measure displacement, angle, centering, surface uniformity and distance. See X-ray diodes for explanation of different operating modes.

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