US 12,094,507 B2
Hologram recording composition, hologram recording medium, diffraction optical element, and optical device, optical component, and image display device using diffraction optical element
Eri Igarashi, Tokyo (JP); Takahiro Ohe, Tokyo (JP); Hisaya Hara, Tokyo (JP); Kenshiro Kawasaki, Tokyo (JP); and Daisuke Hobara, Tokyo (JP)
Assigned to Sony Group Corporation, Tokyo (JP)
Appl. No. 17/312,860
Filed by Sony Group Corporation, Tokyo (JP)
PCT Filed Oct. 21, 2019, PCT No. PCT/JP2019/041403
§ 371(c)(1), (2) Date Jun. 10, 2021,
PCT Pub. No. WO2020/121653, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 2018-231346 (JP), filed on Dec. 11, 2018.
Prior Publication US 2022/0013142 A1, Jan. 13, 2022
Int. Cl. G11B 7/0065 (2006.01); C08F 2/50 (2006.01); G02B 5/32 (2006.01); G03H 1/02 (2006.01); G11B 7/24044 (2013.01); G11B 7/245 (2006.01); G11B 7/246 (2013.01)
CPC G11B 7/0065 (2013.01) [C08F 2/50 (2013.01); G02B 5/32 (2013.01); G03H 1/0248 (2013.01); G11B 7/24044 (2013.01); G11B 7/245 (2013.01); G11B 7/246 (2013.01); G03H 2001/0264 (2013.01); G03H 2260/12 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A hologram recording composition comprising at least a heteropoly acid, a photopolymerizable monomer, a photopolymerization initiator, and a sensitizing dye having absorption in a visible light region in a presence of an acid,
wherein the heteropoly acid is phosphotungstic acid dodecahydrate, wherein the photopolymerizable monomer is tricyclodecanedimethanol diacrylate, wherein the photopolymerization initiator is 4-isopropyl-4′-methyldiphenyliodonium tetrakis(pentafluorophenyl) borate, wherein the sensitizing dye is 2,5-dibenzylidene cyclopentanone, and
wherein the hologram recording composition in a diffraction optical element is capable of providing a refractive index modulation degree of 0.05 or more in the diffraction optical element.