TOTAL REFLECTION MEASURING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a total reflection measuring apparatus, capable of obtaining a total reflection by easily and accurately changing the incident angle using one apparatus. SOLUTION: The total reflection measuring apparatus 122 which obtains a totally reflected beam 120 converges an incident beam 118 at an incident angle of critical angle or larger to an abutting surface 131 of a total reflection prism with a sample to be measured. The apparatus 122 comprises an incident angle changing means 164, capable of changing the incident angle of the beam 118 to the surface 131 of a total reflection prism 110 with the sample 112 within a range of the angle capable of measuring total reflection. The apparatus 122 obtains the beam 120 by changing the incident angle of the beam 118 by the means 164.