Microstereophotolithography using a liquid crystal display as dynamic mask-generator |
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Authors: | A. Bertsch S. Zissi J. Y. Jézéquel S. Corbel J. C. André |
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Affiliation: | (1) GdR 1080 CNRS ≪ Procédés Optiques; Applications aux Microtechniques ≫ DCPR-ENSIC-INPL, B.P. 451, F-54001 Nancy Cedex, France, FR |
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Abstract: | A new laser microstereophotolithography process has been developed in our laboratory to manufacture three-dimensional parts with a high accuracy. As usual in laser stereophotolithography or laser microstereophotolithography, the part is manufactured layer by layer by a light-induced space-resolved polymerization. Until now, in all the already existing microstereophotolithography devices a layer is manufactured vector by vector, by moving the part beneath the initiating light source which remains motionless. We developed a simpler and easier process, in which we can manufacture an entire layer by irradiating its whole surface only once: we used a liquid crystal display as a dynamic generator of masks. In the device we set up, we need only one mobile element, the z translator, all the others are fixed. We manufactured several different 3D microparts, in particular a piece of bevel microgearing with helicoidal cogs, the volume of which is less than half a cubic millimetre. Received: 14 December 1995 / Accepted: 16 September 1996 |
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