In order to achieve the target detection and imaging in ultra weak light environment,the avalanche photodiode (APD) is used to comprise the photon counting imaging experimental platform.There are some advantages which are high sensitivity,small size and operation under low supply power in APD.The optical field can be quantized and made up of photons according to the wave-particle duality of light.The photon counting technique is introduced to detect the number of photons at the target sampling points.Under ...
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