A light-shielding composition includes a light-shielding pigment, a resin, a polymerizable compound, which is a low-molecular-weight compound containing an ethylenically unsaturated group, and a polymerization initiator, in which the light-shielding pigment contains an inorganic particle, and an inorganic compound coating the inorganic particle, the inorganic particle contains one or more nitrogen-containing metal compounds selected from the group consisting of zirconium nitride, zirconium oxynitride, vanadium nitride, vanadium oxynitride, niobium nitride, and niobium oxynitride, the inorganic compound contains a silicon atom, and a contained atom number ratio of a total content of metallic atoms, which are selected from the group consisting of a zirconium atom, a vanadium atom, and a niobium atom, to a content of the silicon atom in a surface of the light-shielding pigment, as determined by X-ray photoelectron spectroscopy, is greater than 1.0.

A black material of the present invention consists of a zirconium nitride powder containing yttrium. The amount of the yttrium is 1.0% by mass to 12.0% by mass with respect to a total 100% by mass of the zirconium nitride powder and the yttrium. In a transmission spectrum obtained from a dispersion in which the concentration of the zirconium nitride powder containing yttrium is 50 ppm, assuming that the light transmittance at a wavelength of 550 nm is denoted by X.sub.1, and the light transmittance at a wavelength of 365 nm is denoted by X.sub.2, X.sub.1 is 7.5% or less, X.sub.2 is 25% or more, and X.sub.2/X.sub.1 is 3.5 or more.

The present invention provides a radiation transmission-suppressing film that can protect an imaging apparatus from a radiation without adversely affecting the imaging performance of the imaging apparatus. The radiation transmission-suppressing film of the present invention includes a polyvinyl alcohol-based resin film containing boric acid, wherein a product of a boric acid content (wt %) in the polyvinyl alcohol-based resin film and a thickness (μm) of the polyvinyl alcohol-based resin film is 500 or more.

The present invention provides a radiation transmission-suppressing film that can protect an imaging apparatus from a radiation without adversely affecting the imaging performance of the imaging apparatus. The radiation transmission-suppressing film of the present invention includes a polyvinyl alcohol-based resin film containing boric acid, wherein a product of a boric acid content (wt %) in the polyvinyl alcohol-based resin film and a thickness (μm) of the polyvinyl alcohol-based resin film is 500 or more.

An infrared cut filter including a film that includes a cyanine dye including a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine, and a tris(pentafluoroethyl)trifluorophosphate anion, and a copolymer including a first repeating unit from a first monomer that is an acrylic monomer having a cyclic ether group, and a second repeating unit from a second monomer that is a monomer having a functional group that reacts with the cyclic ether group.

An infrared cut filter including a film that includes a cyanine dye including a cation having a polymethine and a nitrogen-containing heterocycle at each end of the polymethine, and a tris(pentafluoroethyl)trifluorophosphate anion, and a copolymer including a first repeating unit from a first monomer that is an acrylic monomer having a cyclic ether group, and a second repeating unit from a second monomer that is a monomer having a functional group that reacts with the cyclic ether group.

An optical filter (1a) includes a UV-IR-absorbing layer and has the following characteristics (i) to (v) when light with wavelengths of 300 nm to 1200 nm is incident at an incident angle of 0°: (i) an average transmittance of 78% or more in the wavelength range of 450 nm to 600 nm; (ii) a spectral transmittance of 1% or less in the wavelength range of 750 nm to 1080 nm; (iii) a spectral transmittance of 1% or less in the wavelength range of 300 nm to 350 nm; (iv) a decreasing spectral transmittance with increasing wavelength in the wavelength range of 600 nm to 750 nm and a first IR cut-off wavelength in the wavelength range of 620 nm to 680 nm; and (v) an increasing spectral transmittance with increasing wavelength in the wavelength range of 350 nm to 450 nm and a first UV cut-off wavelength in the wavelength range of 380 nm to 430 nm.

An optical filter (1a) includes a UV-IR-absorbing layer and has the following characteristics (i) to (v) when light with wavelengths of 300 nm to 1200 nm is incident at an incident angle of 0°: (i) an average transmittance of 78% or more in the wavelength range of 450 nm to 600 nm; (ii) a spectral transmittance of 1% or less in the wavelength range of 750 nm to 1080 nm; (iii) a spectral transmittance of 1% or less in the wavelength range of 300 nm to 350 nm; (iv) a decreasing spectral transmittance with increasing wavelength in the wavelength range of 600 nm to 750 nm and a first IR cut-off wavelength in the wavelength range of 620 nm to 680 nm; and (v) an increasing spectral transmittance with increasing wavelength in the wavelength range of 350 nm to 450 nm and a first UV cut-off wavelength in the wavelength range of 380 nm to 430 nm.

A coating composition, which contains one or more compounds (A) according to formula (I) and a pigment (B) having a minimum integrated transmittance within the range of 380 to 600 nm, is provided:

##STR00001##

In formula (I), each R.sub.1, R.sub.2 and R.sub.3 is independently —OR.sub.4, R.sub.4 being independently hydrogen or a C.sub.1 to C.sub.24 hydrocarbyl group optionally containing heteroatoms, or C.sub.1 to C.sub.24 hydrocarbyl groups optionally containing heteroatoms; n is 2, 3, 4 or 5; o is 2, 3, 4 or 5; p is 2, 3, 4 or 5; with the proviso that at least one of R.sub.1 and at least one of R.sub.2 and at least one of R.sub.3 is —OR.sub.4. A coating is obtained by applying the coating composition to a substrate for protecting the substrate against UV/Vis-radiation or for stabilizing the substrate against the deleterious influence of UV/Vis-radiation.

A coating composition, which contains one or more compounds (A) according to formula (I) and a pigment (B) having a minimum integrated transmittance within the range of 380 to 600 nm, is provided:

##STR00001##

In formula (I), each R.sub.1, R.sub.2 and R.sub.3 is independently —OR.sub.4, R.sub.4 being independently hydrogen or a C.sub.1 to C.sub.24 hydrocarbyl group optionally containing heteroatoms, or C.sub.1 to C.sub.24 hydrocarbyl groups optionally containing heteroatoms; n is 2, 3, 4 or 5; o is 2, 3, 4 or 5; p is 2, 3, 4 or 5; with the proviso that at least one of R.sub.1 and at least one of R.sub.2 and at least one of R.sub.3 is —OR.sub.4. A coating is obtained by applying the coating composition to a substrate for protecting the substrate against UV/Vis-radiation or for stabilizing the substrate against the deleterious influence of UV/Vis-radiation.