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stereolithography
Stereolithography (SLA or SL; also known as Optical Fabrication, Photo-Solidification, Solid Free-Form Fabrication, Solid Imaging, Rapid Prototyping, Resin Printing, and 3D printing) is a form of additive manufacturing technology used for creating models, prototypes, patterns, and production parts in a layer by layer fashion using photopolymerization.〔U.S. Patent (4,575,330 ) (“Apparatus for Production of Three-Dimensional Objects by Stereolithography”)〕
==History==
3D printing was first known as Rapid Prototyping and was invented with the intent of allowing engineers to create prototypes of their designs in a more time effective manner.〔Hull, Chuck. “On Stereolithography.” Virtual and Physical Prototyping. Vol 7. (2012): 177. Web. 11 Oct, 2015〕〔Gibson, Ian, and Jorge Bártolo, Paulo. “History of Stereolithography.” Stereolithography: Materials, Processes, and Applications. (2011): 41-43. Web. 7 October 2015.〕 The technology first appeared as early as the 1970s and it was Japanese researcher, Dr. Hideo Kodama who first invented the modern layered approach to stereolithography using ultraviolet light to cure photosensitive polymers.〔 The term “stereolithography” was coined in 1986 by Charles (Chuck) W. Hull.〔 Chuck Hull patented stereolithography as a method of creating 3D objects by successively "printing" thin layers of an object using a medium curable by ultraviolet light, starting from the bottom layer to the top layer. Hull's patent described a concentrated beam of ultraviolet light focused onto the surface of a vat filled with a liquid photometer. The UV light beam is focused onto the surface of the liquid photopolymer, creating each layer of the desired 3D object by means of crosslinking (or degrading a polymer). In 1986, Hull founded the world's first 3D printing company, 3D Systems Inc,〔(3D Systems Inc Company Info )〕〔(Stereolithography )〕〔(What is Stereolithography? )〕 which is currently based in Rock Hill, SC. Stereolithography's success in the automotive industry allowed 3D printing to achieve industry status and the technology continues to find innovation uses in countless fields of study.〔〔Jacobs, Paul F. “Introduction to Rapid Prototyping and Manufacturing.” Rapid Prototyping and Manufacturing: Fundamentals of Stereolithography. 1st Ed. (1992): 4-6. Web. 7 October 2015.〕 Attempts have been made to construct mathematical models of stereolithography processes and to design algorithms to determine whether a proposed object may be constructed using 3D printing.〔B. Asberg, G. Blanco, P. Bose, J. Garcia-Lopez, M. Overmars, G. Toussaint, G. Wilfong and B. Zhu, "Feasibility of design in stereolithography," ''Algorithmica'', Special Issue on Computational Geometry in Manufacturing, Vol. 19, No. 1/2, Sept/Oct, 1997, pp. 61–83.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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