US 9,810,821 B2
Infrared ray cutoff filter
Toshihide Ezoe, Shizuoka (JP); Kazuto Shimada, Shizuoka (JP); and Shinichiro Sonoda, Kanagawa (JP)
Assigned to FUJIFILM Corporation, Tokyo (JP)
Filed by FUJIFILM Corporation, Tokyo (JP)
Filed on Jun. 10, 2015, as Appl. No. 14/735,330.
Application 14/735,330 is a continuation of application No. PCT/JP2013/084756, filed on Dec. 25, 2013.
Claims priority of application No. 2012-288697 (JP), filed on Dec. 28, 2012; and application No. 2013-267582 (JP), filed on Dec. 25, 2013.
Prior Publication US 2015/0277002 A1, Oct. 1, 2015
Int. Cl. F21V 9/04 (2006.01); G02B 5/20 (2006.01); B32B 7/02 (2006.01); C08L 101/12 (2006.01); G02B 5/22 (2006.01); G02B 5/28 (2006.01); C09D 5/33 (2006.01); C09D 183/04 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/28 (2006.01); C08K 3/22 (2006.01); C08K 5/16 (2006.01); C08K 5/3417 (2006.01); G02B 1/04 (2006.01); H04N 9/04 (2006.01); C08K 5/00 (2006.01)
CPC G02B 5/208 (2013.01) [B32B 7/02 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/283 (2013.01); C08K 3/22 (2013.01); C08K 5/16 (2013.01); C08K 5/3417 (2013.01); C08L 101/12 (2013.01); C09D 5/004 (2013.01); C09D 183/04 (2013.01); G02B 1/04 (2013.01); G02B 5/223 (2013.01); G02B 5/282 (2013.01); H04N 9/045 (2013.01); B32B 2264/102 (2013.01); B32B 2307/4026 (2013.01); B32B 2307/418 (2013.01); B32B 2457/00 (2013.01); C08K 5/0041 (2013.01); C08K 2003/2241 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An infrared ray cutoff filter comprising:
two or more high refractive index layers with a refractive index ranging from 1.65 to 2.00, and
two or more low refractive index layers with a refractive index ranging from 1.20 to 1.45,
wherein at least one layer of the two or more high refractive index layers and the two or more low refractive index layers contains a dye having a maximum absorption wavelength in a range of 600 nm to 820 nm, and
the two or more low refractive index layers are a plurality of kinds of layers which have different thickness within a range of 50 nm to 250 nm.