Patent ID: 7057731
Filing Date: 2006-06-06
Classification: G01N

Abstract:
1. A measuring method using attenuated total reflection comprising the steps of: entering a collimated light beam containing a plurality of wavelengths, and having a sizable cross sectional area, through a dielectric block of a measuring unit comprising a thin film layer formed on one of the surfaces of said dielectric block, and a sample holding structure for holding a sample provided on said thin film layer, into the interface between said dielectric block and said thin film layer at an angle that satisfies the conditions of attenuated total reflection at said interface; selecting a collimated light beam having a predetermined wavelength from the collimated light beam totally reflected from said interface; and measuring the distribution of optical intensities on the cross section of said selected light beam, wherein said selecting step comprises a variable selection of said predetermined wavelength of said collimated light beam.