Goniometric Spectrophotometerによる織物の反射特性の測定 (II)

抄録

Characteristics of the light reflected from textile fabrics made of viscose spun rayon are investigated with a goniometric spectrophotometer, and the following results are obtained.
1. Most part of the reflected light is the internally scattered light, that is the light which has penetrated into the fabrics and come out of it after many refractions and reflections, and the rest is the light merely reflected from the surfaces of fibres (the surface reflected light).
2. The surface reflected light comprises almost as much specular reflected light as diffused light, multiply reflected on the surface of the fabric without penetrating into it.
3. The surface structure of individual fibres as well as the texture of the specimen have complicated effects upon the properties of the surface reflected light; specimens prepared under different conditions give different goniometric curves.
4. The surface of the fibres is made of rectangular elementary facets with area of about 1×10_??_17μ² each and there are numerous small irregularities of about 0.17 μ on each elementary facet.
5. Owing to the Jentzsch effect, the surface reflected light increases rapidly with the angle of incidence of above a certain critical value.