The present invention aims to provide a near-infrared absorption film having
excellent near-infrared blocking properties and visible light transparency over
a wide wavelength range, and attractive appearance. It further aims to provide
a near-infrared absorption film having excellent near-infrared blocking properties,
visible light transparency, good appearance and excellent durability such as anti-deterioration
properties. The film may comprise a transparent substrate, and a near-infrared
absorption layer containing a cyanine compound represented by the formula (1),
and a diimonium compound.
##STR1##
wherein, in the formula (1), A is a divalent bonding group comprising ethylene.
R1 and R2 are monovalent groups comprising a carbon atom.
X- is a monovalent anion. The film may also comprise a transparent substrate,
and a near-infrared absorption layer containing a layer containing the cyanine
compound represented by the formula (1) and a layer containing a diimonium compound.