| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an infrared ray reflection plate having an improved selective reflection characteristic. <P>SOLUTION: The infrared ray reflection plate has a substrate and at least four light reflection layers X1, X2, X3 and X4, in this order, which are constituted by fixing a cholesteric liquid crystal phase on at least one surface of the substrate. Each of light reflection layers X1, X2 has an equal reflection central wavelengthλ<SB>1</SB>(nm) and reflects circularly polarized light of respective reverse directions. Each of light reflection layers X3, X4 has an equal reflection central wavelengthλ<SB>2</SB>(nm) and reflects circularly polarized light of a reverse direction. Furtherλ<SB>1</SB>andλ<SB>2</SB>satisfy a relation:λ<SB>1</SB><λ<SB>2</SB>. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
