ULTRAVIOLET RAY- AND INFRARED RAY-ABSORBING SYNTHETIC SILICA GLASS AND METHOD FOR PRODUCING THE SAME

• Main Authors: ORIKASA KATSUHIDE, YOSHIDA YOSHIMASA, SATO TATSUHIRO
• Format: Patent
• Language: English
• Published: 28.01.2010
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

PROBLEM TO BE SOLVED: To provide ultraviolet ray- and infrared ray-absorbing synthetic silica glass which has reduced light transmittance in the ultraviolet region and infrared region without incorporation of a metal impurity into the glass and has high transmittance in the visible light region, and to provide a method for producing the same. SOLUTION: The ultraviolet ray- and infrared ray-absorbing synthetic silica glass is characterized in that the total concentration of metal impurities is ≤1 ppm, the oxygen-deficient defect amount at a wavelength of 250 nm is 0.1-2/cm in terms of absorption coefficient, the internal transmittance of light having a wavelength of ≤250 nm is 0-80 %/cm, the internal transmittance of light having a wavelength of 500-1,100 nm is 50-92%/cm, and the internal transmittance of light having a wavelength of ≥1,500 nm is 0-85 %/cm. COPYRIGHT: (C)2010,JPO&INPIT