Light detector, correction coefficient calculation device, and correction coefficient calculation method

A light detector comprising:

• a light receiving element that receives light and outputs a light receiving signal;
• a variable amplification circuit that amplifies the light receiving signal which is input;
• a storage unit that stores at least one of a correction coefficient that is a rate of change of a dark voltage value, or a dark voltage table that correlates a corrected dark voltage value calculated based on the correction coefficient with a gain of the variable amplification circuit;
• and
• an output value correction unit that corrects the output value of the variable amplification circuit by using the correction coefficient or the dark voltage table.

A light detector comprising:

• a light receiver including a variable amplification circuit that amplifies a light receiving signal obtained by receiving light;
• and
• a dark voltage correction unit that calculates a correction coefficient for correcting a dark voltage value outputted by the light receiver in an environment where no light is incident on the light receiver,
• wherein the dark voltage correction unit calculates a rate of change of the dark voltage value with respect to gains of the variable amplification circuit as the correction coefficient, based on a first dark voltage value which is the dark voltage value when the gain of the variable amplification circuit is a first gain and a second dark voltage value which is the dark voltage value when the gain of the variable amplification circuit is a second gain.