| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a Fourier transform infrared spectroscopic photometer for detecting transmitted light or reflected light from a sample as an analog signal, converting the detected signal into a digital signal using an A/D converter, and obtaining a spectrum by a Fourier transform of the digital signal, which can efficiently utilize an input range of the A/D converter and prevent an overflow that exceeds the input range of the A/D converter. <P>SOLUTION: A Fourier transform infrared spectroscopic photometer of the present invention is provided with a control/processing unit 30 that predicts a maximum value of an output signal of an A/D converter 28 in the subsequent measurement from a difference value between a maximum value of an output signal of the A/D converter 28 in the current measurement and a maximum value of an output signal of the A/D converter 28 in the previous measurement, and determines an amplification rate of an amplifier 26 in the subsequent measurement based on the predicted value. <P>COPYRIGHT: (C)2012,JPO&INPIT |
