Optical multilayer film and reflective screen

Abstract

An optical multilayer film and reflective screen are provided. An optical multilayer film includes an optical laminate A including a plurality of types of optical layers having different refractive indices laminated on each other, the optical laminate A having a reflection characteristic in which the reflectance peak intensities in the red, green, and blue wavelength regions are substantially the same; and an optical laminate B including a plurality of types of optical layers having different refractive indices laminated on each other, the optical laminate B having a reflection characteristic in which the bottom of the reflectance curve lies in the green wavelength region.

1 . An optical multilayer film comprising: 
 a substrate; and    a plurality of optical layers having different refractive indices laminated on the substrate,    wherein the optical multilayer film exhibits a high reflection characteristic having respective reflectance peaks with respect to light in red, green, and blue wavelength regions and a high transmission characteristic with respect to at least light in a visible wavelength region other than the light in red, green, and blue wavelength regions; and    the reflectance peak intensities in at least one of the red and blue wavelength regions are higher than the reflectance peak intensity in the green wavelength region.    
   
   
       2 . The optical multilayer film according to  claim 1 , wherein the reflection peak intensities in at least one of the red and blue wavelength regions are at least 1.2 times the reflectance peak intensity in the green wavelength region.  
   
   
       3 . An optical multilayer film comprising: 
 a substrate; and    a plurality of optical layers having different refractive indices laminated on the substrate,    wherein the optical multilayer film exhibits a high reflection characteristic having respective reflectance peaks with respect to light in red, green, and blue wavelength regions and a high transmission characteristic with respect to at least light in a visible wavelength region other than the light in the red, green, and blue wavelength regions; and    at least one of the red and blue wavelength regions have a plurality of reflectance peaks with a reflectance of 40% or more.    
   
   
       4 . A reflective screen for reflecting light from a light source to display an image, the reflective screen comprising: 
 an optical multilayer film including a substrate; and    a plurality of optical layers having different refractive indices laminated on the substrate,    wherein the optical multilayer film exhibits a high reflection characteristic having respective reflectance peaks with respect to light in the red, green, and blue wavelength regions and a high transmission characteristic with respect to at least light in a visible wavelength region other than the light in red, green, and blue wavelength regions; and    the reflectance peak intensities in at least one of the red and blue wavelength regions are higher than the reflectance peak intensity in the green wavelength region;    a light absorption layer which absorbs light transmitted through the optical multilayer film; and    a light-scattering layer which scatters light reflected from the optical multilayer film, the light-scattering layer being disposed on the outermost layer of the optical multilayer film.    
   
   
       5 . The reflective screen according to  claim 4 , wherein the light source is a high-pressure mercury lamp.  
   
   
       6 . A reflective screen for reflecting light from a light source to display an image, the reflective screen comprising: 
 an optical multilayer film including a substrate and    a plurality of optical layers having different refractive indices laminated on the substrate,    wherein the optical multilayer film exhibits a high reflection characteristic having respective reflectance peaks with respect to light in red, green, and blue wavelength regions and a high transmission characteristic with respect to at least light in a visible wavelength region other than the light in the red, green, and blue wavelength regions and    at least one of the red and blue wavelength regions have a plurality of reflectance peaks with a reflectance of 40% or more;    a light absorption layer which absorbs light transmitted through the optical multilayer film; and    a light-scattering layer which scatters light reflected from the optical multilayer film, the light-scattering layer being disposed on the outermost layer of the optical multilayer film.