| 摘要 |
PURPOSE: To manufacture a solid article of a large size by providing a stationary mirror at a predetermined angle to a dynamic mirror system to reflect a beam to be traced by a beam generator substantially perpendicularly to a horizotal target surface, thereby reducing a size of a stereolithogrpahic apparatus. CONSTITUTION: A liquid photocurable resin 18 is filled in a vat 16, and a laser of an ultraviolet argon ion laser 20 curs a photosensitive polymer to a predetermined depth at a desired speed at a horizontal target surface. Two mirrors 28, 30 operate to reflect beams at 90 deg.. A beam enlarging unit 32 enlarges the laser after passing a resiual optical system, focuses it directs it to a dynamic mirror system 34, which directs the received laser above the vat 16. A stationary mirror 36 is fixedly disposed in a frame 22. When a reflected beam is emitted to a center of the target surface, it is directed directly under the vertical of the target surface of the vat 16 to form a normal of the surface. |
