NEAR INFRARED RAY-REFLECTIVE SUBSTRATE AND NEAR INFRARED RAY-REFLECTIVE LAMINATED GLASS USING THE SUBSTRATE, AND NEAR INFRARED RAY-REFLECTIVE DOUBLE-GLAZED UNIT

摘要

PPROBLEM TO BE SOLVED: To provide a near infrared ray-reflective substrate having high visible light transmissivity stipulated in JIS R 3106-1998, high reflectivity in the near infrared ray region thereby good in heat insulation effects, and allowing various radio waves to transmit therethrough, and provide a near infrared ray reflective laminated glass and a near infrared ray reflective double-glazed unit. PSOLUTION: This near infrared ray-reflective substrate is formed by alternately laminating a dielectric film of low refractive index and a dielectric film of high refractive index on transparent plate glass, where the visible light transmissivity, stipulated in JIS R 3106-1998 of the plate glass on which the near infrared ray-refractive film is formed, is 70% and a maximal value of reflection exceeding 50% exists in the wavelength region of 900-1,400 nm. As the dielectric film of a high refractive index, TiOSB2/SBor NbSB2/SBOSB5/SBor TaSB2/SBOSB5/SBis used, and as the dielectric film of a low refractive index, SiOSB2/SBis used. PCOPYRIGHT: (C)2007,JPO&INPIT