Patent ID: 6518572
Filing Date: 2003-02-11
Classification: G01N

Abstract:
An infrared microscopic/FT-IR (Fourier transform infrared spectrometer) apparatus based on an attenuated total reflection method, said apparatus comprising:a semi-spherical prism having a smooth, flat bottom surface; and an incident angle variable optical system in which a sample mounting portion is separated from an incident optical system by said semi-spherical prism; the incident angle variable optical system including first and second movable mirrors positioned in parallel with one another and mounted on a linearly movable stage; wherein a surface portion of a sample is analyzed by bringing said prism in press-contact with the surface of the sample, making an infrared light ray incident on said prism at a specific angle, and analyzing the spectrum of the infrared light ray totally reflected from the surface of the sample by said FT-IR apparatus; and the specific angle of the infrared light ray incident on said prism is changed by linearly translating the movable stage.