Patent ID: 9746374
Date: 2017-08-29
CPC Classifications: G01J

Claim:
1. A spectrophotometer, comprising: a photodetection unit configured to convert received light into an electric signal to output the electric signal; a circuit unit comprising a plurality of gain amplifiers and a plurality of AD converters configured to amplify an output signal from the photodetection unit by a plurality of gains using the plurality of gain amplifiers and configured to convert the amplified output signals into digital signals using the plurality of AD converters to output the digital signals as a plurality of pieces of light amount data; a saturation determination unit configured to determine whether or not each of the plurality of pieces of light amount data from the circuit unit has been saturated; and a measurement result calculation unit configured to calculate, in accordance with a result of the determination by the saturation determination unit, a measurement result of the received light using a part or all of the plurality of pieces of light amount data; wherein the measurement result calculation unit calculates the measurement result of the received light by dividing a sum of a part or all of the plurality of pieces of light amount data except for the light amount data that is determined to have been saturated by the saturation determination unit by a sum of the plurality of gains corresponding to the cart or all of the plurality of pieces of light amount data.