Patent Number: 7,535,004

Title: Fourier transform infrared spectrophotometer

Abstract: Disclosed is a Fourier transform infrared spectrophotometer, which comprises: a main interferometer section including a beam splitter, a fixed mirror, a movable mirror, and a phase plate disposed between the beam splitter and the fixed mirror; a control interferometer section having a quadrature control system for calculating a position of the movable mirror; a center-burst-position detection section operable, based on an input of interference signals and interferograms, to subject respective intensities of the interferograms to an addition processing while correcting a positional deviation of the movable mirror, so as to obtain a cumulative interferogram, and detecting a center burst position having a maximum intensity value in the cumulative interferogram; a center-burst-position storage section operable to store the detected center burst position; and a measurement-start-position determination section operable, based on the stored center burst position, to determine a measurement start position of the movable mirror during the measurement operation.

Inventors: Yamamoto; Yoshitake (Kyoto, JP)

Assignee: Shimadzu Corporation

International Classification: G01B 9/02 (20060101); G01J 3/45 (20060101); G01J 3/453 (20060101)

Expiration Date: 2021-05-19 0:00:00