| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a double glazing using a selective transmitting/reflecting film for allowing transmission of a visible ray and a near-infrared ray, and reflection of a middle-to far-infrared ray. <P>SOLUTION: A deposited film 1 formed by depositing a zinc oxide-based ZnO:Al or ZnO:Ga transparent metal thin film on a transparent film is arranged between transparent panes of glass 21 of the double glazing 2. By adjusting the thickness of the thin film preferably to be 300-700 nm, especially preferably to be 300-500 nm, such a selective transmission/reflection function is shown that the wavelength (wavelength of 0.7-2.5 μm) of a near-infrared ray region is selectively transmitted, and that the wavelength (wavelength of 2.5-4 μm) of a middle-to far-infrared ray region and the wavelength (wavelength of 4-1,000 μm) of a far-infrared ray are reflected, and thereby a heating/cooling load is reduced as much as 10-20% or more in comparison with a conventional sash by being used for an opening part of a building or the like to achieve energy conservation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
