IMPROVED STEREOLITHOGRAPHY TECHNIQUES AND RELATED SYSTEMS AND METHODS

• Main Authors: REED CHRISTIAN, LOOMIS JAMES, OIKONOMOPOULOS KONSTANTINOS, WIGHTON SHANE, MEGRETSKI DMITRI, JOACHIM ROBERT, MOLDAVE JACK, FRANTZDALE BENJAMIN, JOHNSTON SCOTT, GOLDMAN ANDREW M, LOBOVSKY MAXIM, HE RAN, BENNEDSEN SARAH, DAVID PRICE
• Format: Patent
• Language: Chinese; English
• Published: 16.03.2021
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Improved stereolithography techniques are provided. Such improved techniques may include multi-film containers, techniques for producing a flat film surface, techniques for force sensing, techniques for directing light from a movable stage, and/or film tensioning techniques. According to some aspects, a container may include multiple films that are at least partially detached from one another. Insome embodiments, the multiple films may include films formed from different materials. As one example, an upper film may be formed so as to be relatively impermeable to substances within a source material of an additive fabrication device, whereas a lower film may be formed so as to provide desirable mechanical properties. In some cases, the multiple films may be commonly tensioned while being unattached to one another. 提供了改进的立体光刻技术。这样的改进技术可以包括多膜容器、用于生产平坦的膜表面的技术、用于力传感的技术、用于引导来自可移动台的光的技术和/或膜张紧技术。根据一些方面，容器可以包括至少部分地彼此脱离的多个膜。在一些实施方案中，多个膜可以包括由不同材料形成的膜。作为一个实例，可以形成上膜以便相对不可渗透到增材制造装置的原材料内的物质，然而可以形成下膜以便提供期望的机械特性。在一些情况下，多个膜通常可以