ULTRAVIOLET-RAY ILLUMINANCE MEASURING INSTRUMENT OF ULTRAVIOLET-RAY IRRADIATION DEVICE FOR OPTICAL FIBER DRAWING DEVICE

摘要

PURPOSE:To control the output illuminance of UV light in real time by collecting and guiding the UV light by a tubular housing and measuring the illuminance of the UV light directly. CONSTITUTION:A prism 6, a sleeve 7, and a quartz fiber 8 are put in the tubular housing 4 to form a light guide part. A hot-ray absorption filter 11 and an ultraviolet-ray transmission interference filter 12 are arranged closely to the output end part of the sleeve 17 at the other end of a quartz optical fiber 8 to constitute a dimming part which transmits UV light with specific wavelength selectively. Further, a photoelectric conversion part composed of a photodiode 5 is provided and the electric signal from the photoelectric conversion E part 13 is sent to the display part consisting of a signal processing part 14 and a meter 15. The UV light emitted by a UV lamp 2 is converted on the center of a quartz tube 3. When the tubular housing 4 is inserted into a quartz pipe 3, the UV light is entered into the tubular housing 4 from a light collection hole 5 and guided perpendicularly upward by the prism 7.