Jasco Corporation

Norio Wakimoto

Takashi Shimamura

Jun Koshobu

Tetsuji Sunami

A method for measuring spectrum by Fourier-transforming an interferogram of an infrared interference wave acquired with an interferometer, including a step of over-sampling intensity signals of the interference wave at positions (D1, D2, . . . ) of a movable mirror set on the basis of a wavelength &#x3bb;1 of a semi-conductor laser, and a step of interpolating intensity signals (I1', I2&#x2032;, . . . ) that would be obtained when the interference wave is sampled at positions (D1&#x2032;, D2&#x2032;, . . . ) of the movable mirror set on the basis of a wavelength &#x3bb;0 of a He&#x2014;Ne laser, by using the over-sampled intensity signals (I1, I2, . . . ), for calculating the spectrum with the interferogram based on the interpolated intensity signals (I1&#x2032;, I2&#x2032;, . . . ) and for an efficient use of conventional stored spectrum data which are measured based on the wavelength &#x3bb;0.

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Tokyo, Japan

Norio Wakimoto