公开(公告)号：US11827731B2

公开(公告)日：2023-11-28

申请号：US17260760

申请日：2020-01-10

申请人： LG CHEM, LTD.

发明人： Seokhoon Jang ,  Heon Kim ,  Se Hyun Kwon ,  Yeongrae Chang

IPC分类号： C08F263/04 ,  C08K5/02 ,  C08K5/521 ,  C08L31/04

CPC分类号： C08F263/04 ,  C08K5/02 ,  C08K5/521 ,  C08L31/04

摘要： The present disclosure relates to a photopolymer composition for hologram production comprising a polymer matrix or a precursor thereof having a glass transition temperature of 80° C. or less; a photoreactive monomer; a low refractive index fluorine-based compound; and a photoinitiator, a hologram recording medium produced from the photopolymer composition, an optical element comprising the hologram recording medium, and a holographic recording method using the hologram recording medium.

公开(公告)号：US11307494B2

公开(公告)日：2022-04-19

申请号：US16764421

申请日：2019-09-10

申请人： LG CHEM, LTD.

发明人： Heon Kim ,  Seokhoon Jang ,  Se Hyun Kwon ,  Yeongrae Chang ,  Jinseok Byun

IPC分类号： G03F7/00 ,  G03F7/033 ,  G03F7/027 ,  G03H1/02 ,  G11B7/24044 ,  C08F220/18

摘要： The present disclosure relates to a hologram medium comprising: a polymer substrate including a polymer resin in which a silane-based functional group is located in a main chain or a branched chain, wherein a fine pattern is formed on at least one surface of the polymer substrate, and an optical element.

公开(公告)号：US11226557B2

公开(公告)日：2022-01-18

申请号：US16607588

申请日：2018-12-07

申请人： LG CHEM, LTD.

发明人： Seokhoon Jang ,  Hyunsup Lee ,  Heon Kim ,  Se Hyun Kwon ,  Yeongrae Chang

IPC分类号： G03F7/004 ,  G03H1/02 ,  C08L51/08 ,  C08L83/12 ,  G03F7/00 ,  C08L75/04

摘要： The present disclosure relates to a hologram recording medium having a main relaxation temperature (Tr) of 0° C. or less, wherein the Tr is a point where a rate of change of phase angle with respect to temperature is the largest in a range of −80° C. to 30° C. in dynamic mechanical analysis. The present disclosure also relates to an optical element including the same and a holographic recording method using the hologram recording medium.

公开(公告)号：US11079678B2

公开(公告)日：2021-08-03

申请号：US16343153

申请日：2018-09-11

申请人： LG CHEM, LTD.

发明人： Seok Hoon Jang ,  Heon Kim ,  Yongjoon Heo ,  Se Hyun Kwon ,  Yeong Rae Chang

IPC分类号： G03H1/02 ,  G03F7/004 ,  G03F7/033 ,  C08K5/541 ,  C08F2/50 ,  C08L33/06 ,  C08L43/04 ,  G03F7/075 ,  G03F7/00

摘要： A photopolymer composition comprising a polymer matrix or a precursor thereof including a reaction product between (i) a (meth)acrylate-based (co)polymer in which a silane-based functional group is located in a branched chain and an equivalent weight of the silane-based functional group is 300 g/eq to 2000 g/eq, and (ii) a linear silane crosslinking agent; a photoreactive monomer; and a photoinitiator, a hologram recording medium using the same, an optical element using the hologram recording medium, and a holographic recording method. The photopolymer composition can more easily provide a photopolymer layer having improved durability against temperature and humidity while having a large refractive index modulation value.