| 摘要 |
<p>An infrared cut-off layer containing an ITO powder is formed on one surface of a base film, to form an infrared cut-off film. The ITO powder has a minimum value of a diffused-reflection-functional logarithm, logf(Rd), at a light wavelength of 470 nm or lower, which logarithm is measured on the basis of the following equation, f(Rd)=(1- Rd)<2>/2Rd= alpha /S (Rd: a relative reflectance to a standard sample, alpha : an absorption coefficient, S: a scattering coefficient), formulated for a diffused reflection light, and the minimum value of - 0.1 or less. There is provided an infrared cut-off film having a hue of blue and sufficient transparency.</p> |
