FOURIER TRANSFORM INFRARED SPECTROPHOTOMETER

摘要

PROBLEM TO BE SOLVED: To reduce the electric power consumption of a Fourier transform infrared spectrophotometer including deliquescent optical materials and extend the lifetime of a light source. SOLUTION: The humidity in an interferometer 12 including deliquescent optical materials such as transmitting windows for infrared light 5, 6, and 7 and a beam splitter 10 is controlled to be low with the heat produced at a heater 3 for a light source. Only the electricity of the circuit for the light source and the heater 3 is turned on and that of the other parts that do not participate in the humidity control in the interferometer 12 is turned off when the spectrophotometer is turned off and the measurement is not performed. Controlling the electric power supply to the heater reduces the power consumption and can extend the lifetime of the light source.