COLORIMETRY APPARATUS FOR ULTRAVIOLET FLUORESCENT BODY

摘要

PURPOSE:To perform colorimetry of a sample of an ultraviolet fluorescent body under the same state as the state of human observation under natural light, by utilizing a visible light emitting body, which emits visible light, and light from an ultraviolet-ray emitting body, which emits ultraviolet rays. CONSTITUTION:An ultraviolet-fluorescent-body colorimetry apparatus is composed of an integrating sphere 1, a visible light emitting body 2, an ultraviolet- ray emitting body 3 and a spectral light measuring device 4. A barium sulfate layer 11 is formed on the inner surface of the integrating sphere 1 so as to diffuse the incident light efficiently. A sample S is provided at a specified position. The visible light emitting body 2 is composed of an incandescent lamp and the like and attached to the central part of a light converging concave mirror 21. The ultraviolet-ray emitting body 3 is composed of a small ultraviolet-ray fluorescent lamp, a deuterium discharge tube or the like, which is attached to a specified position, which does not directly face a sample window 12 of said integrating sphere 1 so that the body 3 can be pushed forward and withdrawn.