Pigment dispersions, compositions, infrared transmittance filters, infrared sensors, and infrared cameras

Abstract

This invention provides a pigment dispersion capable of forming a coating film with excellent visible light shielding and infrared light penetration, and low haze value. The pigment dispersion contains (A) a pigment, (B) a dispersant, (C) a resin, and (D) a solvent. The pigment (A) contains CI pigment violet 29. After the pigment dispersion is allowed to stand at room temperature (20-30°C) for more than 24 hours, the concentration of the pigment (A) in the pigment dispersion is adjusted to 100 ppm by mass. The median diameter (D50) of the pigment (A) in the liquid obtained thereby, as observed by dynamic light scattering, is less than 110 nm.