| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a near infrared absorption member that has a high transmission factor in a visible light region, and a low transmission factor in a near infrared region, steeply changes the transmission factor in a wavelength region from 630 nm to 700 nm, and is excellent in humidity resistance. <P>SOLUTION: The near infrared absorption member 10 includes two sheets of transparent substrates 12, and an infrared absorption film 14 arranged between the two sheets of transparent substrates 12 and containing near infrared absorption particles having crystallites of A<SB POS="POST">1/n</SB>CuPO<SB POS="POST">4</SB>. In this case, (A) represents one or more kinds selected from a group consisting of alkaline metals (Li, Na, K, Rb, and Cs), alkaline earth metals (Mg, Ca, Sr, and Ba), and NH<SB POS="POST">4</SB>, n is 1 if (A) is an alkaline metal or NH<SB POS="POST">4</SB>, and is 2 if (A) is an alkaline earth metal. <P>COPYRIGHT: (C)2013,JPO&INPIT |
