US 12,240,164 B2
Window variability correction in additive manufacturing
Anant Chimmalgi, Los Altos, CA (US); Jiayao Zhang, Mountain View, CA (US); James Michael Ian Bennett, San Francisco, CA (US); and Bob E. Feller, San Mateo, CA (US)
Assigned to CARBON, INC., Redwood City, CA (US)
Filed by Carbon, Inc., Redwood City, CA (US)
Filed on Jul. 1, 2021, as Appl. No. 17/365,380.
Application 17/365,380 is a continuation of application No. 16/490,262, granted, now 11,084,207, previously published as PCT/US2018/056668, filed on Oct. 19, 2018.
Claims priority of provisional application 62/585,804, filed on Nov. 14, 2017.
Prior Publication US 2021/0323223 A1, Oct. 21, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B29C 64/124 (2017.01); B33Y 10/00 (2015.01); B29C 64/40 (2017.01); B33Y 30/00 (2015.01); B33Y 50/02 (2015.01)
CPC B29C 64/124 (2017.08) [B33Y 10/00 (2014.12); B29C 64/40 (2017.08); B29K 2995/0065 (2013.01); B33Y 30/00 (2014.12); B33Y 50/02 (2014.12)] 13 Claims
OG exemplary drawing
 
1. A method of making an object on a bottom-up stereolithography apparatus, the apparatus including a light source, a drive assembly, and a controller operatively associated with said light source and said drive assembly, with the light source and/or the drive assembly having at least one adjustable parameter that is adjustable by said controller, the method comprising:
(a) installing a removable window cassette on said apparatus in a configuration through which said light source projects, said window cassette comprising an optically transparent member having a build surface on which an object can be produced, and with said optically transparent member having and at least one variable property therein, said at least one variable property comprising regional optical distortions comprising at least one region of said optically transparent member that distorts an optical image; and then
(b) modifying said at least one adjustable parameter by said controller based on said at least one variable optical property comprising regional optical distortions of said optically transparent member; and then
(c) producing the object on said build surface from a light-polymerizable liquid by bottom-up stereolithography.