Shimadzu Corporation

Shimadzu Co.

Hideaki Katsu

Hiromasa Maruno

Naoji Moriya

Takashi Muramatsu

Fumiaki Otera

Rui Kato

A Fourier transform infrared spectrophotometer includes a main interferometer, a control interferometer, an infrared detector, a control light detector, a waveplate, and a support member. The waveplate is disposed on an optical path of a control light beam and between a fixed mirror or a moving mirror and a beam splitter. The support member supports the waveplate. An outer perimeter of the waveplate includes a supported region supported by the support member and a released region spaced apart from the support member.

Fourier transform infrared spectrophotometer

A Fourier transform infrared spectrophotometer includes a main interfersometer, a control interferometer, an infrared detector, a control light detector, and a beam splitter block. The beam splitter block is disposed between a beam splitter and the control light detector. The control light detector has an optical axis inclined with respect to an optical axis of a control interference light beam.

A gas analyzer is provided, capable of measuring specific gas amount information within a measurement target gas in which pressure varies greatly. The gas analyzer includes a calculation member for calculating specific gas amount information of the nth cycle, a gas pressure change amount calculation unit for calculating an amount of gas pressure change at each time, and a correction signal creation member for generating a time changing, corrected light intensity at each wavelength &#x3bd;, by performing a fitting process using the time-changing intensity over a long time period in a time zone in which the amount of gas pressure change is small but using the time-changing intensity over a short time period in a time zone in which the amount of gas pressure change is large. The calculation member generates a light intensity change of the measurement light in the predetermined wavelength range of &#x3bd;1 to &#x3bd;2 of the nth cycle by using the time changing, corrected light intensity at each wavelength &#x3bd;, and calculates the specified gas amount information for the nth cycle.

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Kyoto, Japan

Hideaki Katsu