| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a light absorption measuring method which enables the minimization of a necessary amount of a sample to be measured and capable of arbitrarily setting the number of times of total reflections by an optical waveguide minimum in size, a light absorption measuring instrument and the optical waveguide usable in them. <P>SOLUTION: In the light absorption measuring method, the light absorbing intensity or light absorbing spectrum in the sample is measured from emitted light using the optical waveguide having one reflecting surface, equipped with a plurality of paired incident and emitting points crossing the reflecting surface at a right angle and symmetrically arranged so as to hold the axial line passing a scheduled one or plurality of reflection points on the reflecting surface, the light entering from the incident point is totally reflected on the sample provided so as to be overlapped with the scheduled reflecting point of the reflecting surface to be emitted from the emitting point present at the position symmetric to the incident point, beams of the emitted light from certain paired emitting points are re-incident at least once from the other paired incident points and the light absorbing intensity or light absorbing spectrum from the emitted light from the final predetermined emitting point is measured. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
