US 11,718,580 B2
Fluorene derivatized monomers and polymers for volume Bragg gratings
Austin Lane, Sammamish, WA (US); Matthew E. Colburn, Woodinville, WA (US); and Lafe Purvis, Redmond, WA (US)
Assigned to META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed by META PLATFORMS TECHNOLOGIES, LLC, Menlo Park, CA (US)
Filed on May 1, 2020, as Appl. No. 16/865,073.
Claims priority of provisional application 62/845,258, filed on May 8, 2019.
Prior Publication US 2020/0354311 A1, Nov. 12, 2020
Int. Cl. G03H 1/02 (2006.01); C07C 69/54 (2006.01); C07C 271/48 (2006.01); C07C 323/62 (2006.01); G03F 7/035 (2006.01); G03F 7/027 (2006.01); G03F 7/025 (2006.01)
CPC C07C 271/48 (2013.01) [C07C 69/54 (2013.01); C07C 323/62 (2013.01); G03F 7/025 (2013.01); G03F 7/027 (2013.01); G03H 1/0248 (2013.01); G03H 2001/0264 (2013.01); G03H 2260/12 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A recording material for writing a volume Bragg grating, the material comprising a transparent support, a polyurethane matrix, and a photopolymerizable imaging precursor compound of Formula II(b):

OG Complex Work Unit Chemistry
wherein in Formula II(b):
at least one of R1 and R2 comprises a group selected from

OG Complex Work Unit Chemistry
at least one of R1 and R2 comprises a polymerizable or crosslinkable group selected from optionally substituted alkenyl, optionally substituted cycloalkenyl, optionally substituted alkynyl, optionally substituted acrylate, optionally substituted methacrylate, optionally substituted styrene, optionally substituted epoxide, optionally substituted thiirane, optionally substituted glycidyl, optionally substituted lactone, optionally substituted lactam, and optionally substituted carbonate.