| 摘要 |
<p>Provided is an optical measuring instrument capable of switching between transmitted light detection and reflected light detection, with a simple configuration, and capable of accurately measuring a physical property by changing the incident angle of terahertz light made incident according to the type of a sample, and also provided is an optical measurement method. The optical measuring instrument comprises: a terahertz light source (4) that emits a pulse light in the terahertz frequency region; a light detector (8) for detecting the pulse light; and two pairs of mirror groups (10a, 10b) used for guiding the pulse light emitted from the terahertz light source (4) to a sample (6) to be measured and for guiding transmitted light transmitted through the sample (6) or reflected light reflected on the sample (6) to the light detector (8), including at least two mirrors or more, and disposed at positions symmetrical about the sample (6). The incident angle of the pulse light emitted from terahertz light source (4) with respect to the sample (6) is changed by changing the positions and angles of the two pairs of mirror groups (10a, 10b).</p> |
