Editing Optoelectronics
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== Photo Transistor == | == Photo Transistor == | ||
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== Photo Multiplier == | == Photo Multiplier == | ||
This is a somewhat unusual ( for most experimenters ) device. It is a vacume tube with a series of electrodes at high voltage from each other. When a photon knocks an electron out of the first electrode it then knocks out more on the second electrode and so on. They can be very sensitive, I think down to single electrons. | This is a somewhat unusual ( for most experimenters ) device. It is a vacume tube with a series of electrodes at high voltage from each other. When a photon knocks an electron out of the first electrode it then knocks out more on the second electrode and so on. They can be very sensitive, I think down to single electrons. |