Device for forming solid shape

Abstract

Abstract PURPOSE:To keep a set layer uniform and make it possible to form a highly accurate solid shape by a method wherein a laser beam to irradiate for forming each layer is made to be an elliptical beam. CONSTITUTION:An ultraviolet laser beam 32, which is generated by an ultraviolet laser 31, is optically modulated by ON-OFF action in accordance with the exposure pattern by an optical modulator 33. The ultraviolet laser beam 32 is made into an elliptical form by cylindrical lenses 37 and 38. The resultant elliptical beam is turned to be an elliptical scanning beam 32a by means of a revolving polygon mirror 39 so as to pass through an ftheta lens 40 and a reflector 41 in order to scan on a liquid photo-setting resin 50 along a main scanning direction C. After the end of one scanning in the main scanning direction, a container 1 is shifted in the auxiliary scanning direction and, after that, the scanning in the main scanning direction is performed again. By repeating the scanning as mentioned above, raster scanning is performed in accordance with the exposure pattern. Thus, the dull corners at the ends in the main scanning direction of a set layer become small or a set layer having nearly uniform thickness over the total length in the main scanning direction is obtained and the whole set layer is made flat, resulting in preventing the disturbance of the shape of a lower set layer, the separation between the upper and the lower layers and the like from developing and allowing to form a highly accurate solid shape.

Inventors

• 👤 Haruhiko Izumi
• 👤 和泉　晴彦
• 👤 Takashi Morihara
• 👤 隆 森原
• 👤 Satoshi Itami
• 👤 伊丹　敏
• 👤 Fumitaka Abe
• 👤 文隆 安部

Bibliographic Details