Patent ID: 7009706
Filing Date: 2006-03-07
Classification: G01N

Abstract:
1. A measuring chip comprising: a dielectric block; and a thin film layer, formed on one surface of said dielectric block, for placing a sample thereon; wherein said measuring chip is employed in a measurement apparatus utilizing attenuated total reflection and comprising a light source for emitting a light beam, an optical system for making said light beam enter said dielectric block at various angles of incidence so that a condition for total internal reflection is satisfied at an interface between said dielectric block and said thin film layer, and photodetection means for measuring the intensity of said light beam totally reflected from said interface to detect attenuated total reflection; wherein said dielectric block is formed as a single block which includes an entrance surface at which said light beam enters said dielectric block, an exit surface from which said light beam emerges, and said one surface on which said thin film layer is formed; and wherein said dielectric block is integrated with said thin film layer and formed from a resin whose photoelastic coefficient is less than 50×10 wherein said thin film layer comprises a metal film whose surface area ratio is less than 1.017, wherein the surface area ratio is a ratio S