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Measuring BRDF (bi-directional reflectance distribution function) requires huge amounts of time because a target object must be illuminated from all incident angles and the reflected lights must be measured from all reflected angles. In this paper, we present a high-speed method to measure BRDFs using an ellipsoidal mirror and a projector. Our method makes(More)
Measuring a bidirectional reflectance distribution function (BRDF) requires long time because a target object must be illuminated from all incident angles and the reflected light must be measured from all reflected angles. A high-speed method is presented to measure BRDFs using an ellipsoidal mirror and a projector. The method can change incident angles(More)
  • K Sumino
  • 1977
The water or sea contamination of diisopropyl naphthalene and phenyl xylylethane in hydrocarbons, which have appeared as alternatives for polychlorobiphenyls, was examined in some areas of Japan. A mass fragmentgraphic technique was applied for rapid determination of trace amounts. In sea mud, 0.019 to 0.16 ppm of diisopropyl naphthalene was found, and a(More)
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