Near infrared absorption filter

Details Near infrared absorption filter Near infrared absorption filter

1999-11-10

2000-09-12

Tucker, Philip

Compositions

Light transmission modifying compositions

Infrared

359885, 313479, F21V 904, G02B 522

Patent

active

061173703

ABSTRACT:
The present invention provides a near infrared absorption filter which contains, in a resin film produced from either or both a polycarbonate and a polyarylate by solution casting, a dithiol-nickel complex represented by the following formula (1): ##STR1## and at least one kind of diimmonium compound represented by the following formula (2): ##STR2## (Wherein R.sub.1 to R.sub.8 may be the same or different and are each a hydrogen atom, an alkyl group or an aryl group; and X.sup.- is an anion represented by halogen anion, perchloric acid anion, antimony hexafluoride anion or nitric acid anion).

REFERENCES:
patent: 3557012 (1971-01-01), Tucker
patent: 3637769 (1972-01-01), Susi
patent: 3709830 (1973-01-01), Susi
patent: 3875199 (1975-04-01), Bloom
patent: 4921317 (1990-05-01), Suzuki et al.
patent: 5248584 (1993-09-01), Miura
patent: 5336584 (1994-08-01), Yanagisawa et al.
patent: 5436113 (1995-07-01), Tsuji et al.
patent: 5482822 (1996-01-01), Mihara et al.
patent: 5804102 (1998-09-01), Oi et al.

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