Patent ID: 6252230
Filing Date: 2001-06-26
Classification: G01N

Abstract:
A refraction type non-destruction measuring apparatus for measuring a refractive index of an interior of an object to be examined by non-destruction comprising:a prism having a predetermined refractive index;projecting means for projecting near infrared light onto said object to be examined through said prism;a contact material filling space between said object to be examined and said prism, and having a refractive index set in conformity with the characteristic of said object to be examined; andlight receiving means for receiving an internal reflected light of a light having entered the interior of said object to be examined through said contact material and said prism;wherein a refractive index Np of said prism, a refractive index Nc of said contact material and a refractive index Ns of said object to be examined have the relation Np>Nc>Ns.