US 7,524,619 B2
Coloring matter absorbing near-infrared ray and filter for cutting off near-infrared ray
Susumu Yamanobe, Gunma (Japan); Masaaki Tamura, Gunma (Japan); Yoji Yamaguchi, Gunma (Japan); and Hideo Yamamoto, Gunma (Japan)
Assigned to Japan Carlit Co., Ltd., Tokyo (Japan)
Appl. No. 10/535,671
PCT Filed Nov. 18, 2003, PCT No. PCT/JP03/14642
§ 371(c)(1), (2), (4) Date May 19, 2005,
PCT Pub. No. WO2004/048480, PCT Pub. Date Jun. 10, 2004.
Claims priority of application No. 2002-339110 (JP), filed on Nov. 22, 2002.
Prior Publication US 2006/0073407 A1, Apr. 06, 2006
Int. Cl. G03C 1/76 (2006.01)
U.S. Cl. 430—321  [570/127; 570/129; 556/6] 28 Claims
OG exemplary drawing
 
1. A near-infrared light absorbing dye obtained from a diimonium salt comprising a sulfonimide represented by the formula (1):

OG Complex Work Unit Drawing
wherein, R individually represents an alkyl group, alkyl halide, aryl group, hydroxyl group, phenyl group, or phenylalkylene group, and R1 and R2 individually represent a fluoroalkyl group or combine to form a fluoroalkylene group.