LIGHT INTENSITY MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To precisely measure extremely small input light intensity affected largely by dark current of an APD in a light intensity measurement method in which the APD is used.

SOLUTION: The light intensity measurement method for measuring intensity of input light received by the APD 11 includes: a first step of measuring the amount of dark current of the APDs 11 under a plurality of ambient temperatures; a second step in which the input light is made incident on the APDs 11 and the amount of output current of the APDs 11 is measured; and a third step of obtaining the intensity of the input light by obtaining a value obtained by subtracting the amount of dark current corresponding to the ambient temperature in the second step from the amount of output current.

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