Medical Three Dimensional Structures Formed by Digital Micromirror Rapid Prototyping

研究结果如下：(1)为了在不降低分辨率的情况下放大快速成型对象，引入了分割投影法。其程序是将计算机屏幕上的横截面图分成任意数字后，通过移动原型机XY台，将投影图复合在感光树脂表面上。该方法可以在不降低分辨率的情况下制作任意尺寸的模型。(2)作为医学三维结构的一种应用，利用快速成型系统制作了一种用于人工心脏的电动运动泵。结果表明，该系统可以在短时间内完成具有复杂三维结构的螺旋桨和泵壳的构造，是开展人工心脏研究的重要工具。(3)利用所开发的快速原型技术制作了μ-全分析（μ-TAS）芯片，证明了微型化生产的可能性。利用投影图形成宽80 μm、高400 μm的电泳微通道，像素分辨率为15 μm²。(4)作为光敏树脂，对一种视觉光敏树脂进行了测试。由此结果表明，金属卤化物灯可以代替超高压汞灯作为光源，DMD投影仪可以作为非扫描快速成型系统。

The results of the research is as follows.(1) The divided projection method has been introduced in order to enlarge the rapid prototyping object without degradation of the resolution. The procedure is that after the cross section picture on the screen of the computer is divided into any number, the projected picture is compounded on the surface of the photosensitive resin by moving the prototyping XY stage. This method can make any size of model without degradation of the resolution.(2) As an application of medical three dimensional structure, an electrical moving pump for artificial heart has been fabricated by the rapid prototyping system. From the result, it has been shown that the propeller and the casing of the pump having the complex three dimensional structure can be constructed in a short time, and the system is a very essential tool for developing the study of artificial heart.(3) A μ-total analysis (μ-TAS) chip has been fabricated by the developed rapid prototyping for proving the possibility of production in a miniature size. The micro channel of 80 μm wide and 400 μm high for electrophoresis is formed using the projected picture with the pixel resolution of 15 μm square.(4) As a photosensitive resin, a visual light sensitive resin was tested. From this result, it has been shown that a metal halide lamp is acceptable as the light source instead of a super high pressure mercury lamp and the projector with DMD can be used as the non scanning rapid prototyping system as it is.