NEAR-INFRARED-RAY ABSORBING AGENT, NEAR-INFRARED-RAY ABSORBING COMPOSITION, NEAR-INFRARED-RAY CUTOFF FILTER USING THEM AND METHOD FOR PRODUCING THE SAME, CAMERA MODULE AND METHOD FOR PRODUCING THE SAME, AND METHOD FOR PRODUCING NEAR-INFRARED-RAY ABSORBING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a copper-phosphate complex having an increased gram absorption coefficient.SOLUTION: A near-infrared-ray absorbing agent contains a copper-phosphate ester complex resulting from reacting a copper salt and a compound that is a phosphate ester compound having an O=P-O angle in a range of 104-120 degrees.