US 12,285,913 B2
Use of dye-type polarizers in a photopolymer curing device
Andrew Goldman, Stow, MA (US); Hayley Whelan, Cambridge, MA (US); Henry Whitney, Weymouth, MA (US); Maxim Lobovsky, Cambridge, MA (US); and Mehmet Dogan, Woburn, MA (US)
Assigned to Formlabs Inc., Somerville, MA (US)
Filed by Formlabs Inc., Somerville, MA (US)
Filed on Jul. 20, 2022, as Appl. No. 17/813,771.
Claims priority of provisional application 63/266,733, filed on Jan. 13, 2022.
Claims priority of provisional application 63/263,950, filed on Nov. 12, 2021.
Prior Publication US 2023/0150200 A1, May 18, 2023
Int. Cl. B33Y 10/00 (2015.01); B29C 64/129 (2017.01); B29C 64/286 (2017.01); B33Y 30/00 (2015.01); C08J 5/18 (2006.01); C08K 5/23 (2006.01); C09B 67/20 (2006.01); G02F 1/1335 (2006.01); G02F 1/13357 (2006.01)
CPC B29C 64/286 (2017.08) [B29C 64/129 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); C08J 5/18 (2013.01); C08K 5/235 (2013.01); C09B 67/0063 (2013.01); G02F 1/133528 (2013.01); G02F 1/133603 (2013.01); G02F 1/133607 (2021.01); G02F 1/133617 (2013.01); G02F 1/13362 (2013.01); C08J 2329/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A curing system for an additive fabrication system, the curing system comprising:
a light source configured to emit light at a wavelength suitable for curing a photopolymerizable material;
a liquid crystal cell configured to receive the light from the light source; and
a first polarizer disposed between the light source and the liquid crystal cell, wherein the first polarizer comprises:
a polyvinyl alcohol (PVA) matrix; and
an organic dye impregnated into the PVA matrix.