Film, color filter, solid image pickup element, and infrared sensor

Abstract

A film in which a light transmittance when light is transmitted from one surface of the film to the other surface has a maximum value of 10% or lower in a wavelength range of 400 to 830 nm and has a minimum value of 70% or higher in a wavelength range of 1000 to 1300 nm.

What is claimed is: 
     
         1 . A film wherein
 a light transmittance when light is transmitted from one surface of the film to the other surface has a maximum value of 10% or lower in a wavelength range of 400 to 830 nm and has a minimum value of 70% or higher in a wavelength range of 1000 to 1300 nm.   
     
     
         2 . The film according to  claim 1 ,
 wherein a ratio A/B of a minimum value A of an absorbance in a wavelength range of 400 to 830 nm to a maximum value B of an absorbance in a wavelength range of 1000 to 1300 nm is 4.5 or higher.   
     
     
         3 . The film according to  claim 1 , further comprising
 colorants,   wherein the colorants include one or more first colorants having an absorption maximum in a wavelength range of 800 to 900 nm and two or more second colorants having an absorption maximum in a wavelength range of 400 to 700 nm.   
     
     
         4 . The film according to  claim 1 , further comprising
 a colorant,   wherein the colorant includes one or more first colorants having an absorption maximum in a wavelength range of 800 to 900 nm, and   the first colorants include at least one compound selected from the group consisting of a pyrrolopyrrole colorant compound, a copper compound, a cyanine colorant compound, a phthalocyanine colorant compound, an iminium colorant compound, a thiol complex compound, a transition metal oxide compound, a squarylium colorant compound, a naphthalocyanine colorant compound, a quaterrylene colorant compound, a dithiol metal complex colorant compound, and a croconium compound.   
     
     
         5 . The film according to  claim 3 , further comprising
 wherein a content of the first colorants is 10 to 200 parts by mass with respect to 100 parts by mass of the second colorants.   
     
     
         6 . The film according to  claim 1 , further comprising
 colorants,   wherein the colorants include two or more second colorants having an absorption maximum in a wavelength range of 400 to 700 nm, and   a content of the second colorants is 10 to 60 mass % with respect to a mass of the film.   
     
     
         7 . The film according to  claim 1 , further comprising
 a colorant,   wherein the colorant includes at least one colorant selected from the group consisting of a bisbenzofuranone pigment, an azomethine pigment, a perylene pigment, and an azo dye.   
     
     
         8 . A color filter comprising:
 the film according to  claim 1 .   
     
     
         9 . A solid image pickup element comprising:
 the color filter according to  claim 8 .   
     
     
         10 . An infrared sensor comprising:
 the color filter according to  claim 8 .