Richard B. Merrill
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Richard Billings Merrill, a.k.a. Dick Merrill, was an American inventor, engineer, and photographer.
Dick Merrill was an avid photographer.
Photodiode
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A photodiode is a semiconductor diode sensitive to photon radiation, such as visible light, infrared or ultraviolet radiation, X-rays and gamma rays. It produces an electrical current when it absorbs
One Ge (top) and three Si (bottom) photodiodes
S604B PhotoTransistor
A one-dimensional photodiode array chip with more than 200 diodes in the line across the center