| 摘要 |
To provide an infrared-light reflective plate having improved selective reflectivity characteristics, there is provided an infrared-light reflective plate reflects an infrared-light of equal to or longer than 700 nm including a substrate, and, on at least one of surfaces of the substrate, at least four light-reflective layers, X1, X2, X3 and X4, formed of a fixed cholesteric liquid crystal phase, and disposed in this order from the substrate, wherein the reflection center wavelengths of the light-reflective layers X1 and X2 are same with each other and are λ1 (nm), and the two layers reflect circularly-polarized light in opposite directions; the reflection center wavelengths of the light-reflective layers X3 and X4 are same with each other and are λ2 (nm), and the two layers reflect circularly-polarized light in opposite directions; and λ1<λ2 is satisfied.
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