Croconic acid compound, dye composition, film, optical filter, solid-state image sensor, image display device and infrared sensor

摘要

PROBLEM TO BE SOLVED: To provide a croconic acid compound capable of forming a near-infrared cut filter having good solubility in a solvent and capable of achieving both shielding property of near-infrared light having a wavelength of 950 nm or more and transparency in a visible region. SOLUTION: A croconic acid compound having a chemical structure represented by the formula (I).(A 1 and A 2 are independently substituted / unsubstituted indolenyl groups or groups having a substituted / unsubstituted julidine structure, and A 1 and A 2 are combinations of indolenyl groups or indolenyl groups. And a combination of groups having a julidine structure) [Selection diagram] None