| 摘要 |
<p>PURPOSE:To make it possible to condense incident light on a minute spot and to receive reflected light in excellent efficiency by combining the end parts of optical fiber bundles for projecting and receiving light into one bundle, and commonly using a condenser lens for projecting and receiving the light. CONSTITUTION:Both end parts of the bundle of a light projecting fiber B1 and the bundle of a light receiving fiber B2 on the side of a sample S are combined as one bundle. At this time, in the inner region H having the constant radius at the central part, the optical fibers of both fiber bundles for projecting and receiving light are uniformly mixed and arranged. The outer surface part J is surrounded by only the fiber B2 on the light receiving side. The fibers are made to face the sample S through a condenser lens L which is commonly used for projecting and receiving the light. Thus, the edge of the light projecting optical fiber bundle on the side of the sample S is concentrated in the region H, and the minute spot can be formed. The reflected light form the sample is irradiated into the region H. The light caused by the aberration of the condenser lens L is received with the outer surface part J. Therefore, the light can be condensed in the minute region, and the light receiving efficiency becomes excellent.</p> |
