- 學位論文
極座標立體微影系統之設計與開發
Design and Development of a Stereolithography System in Polar Coordinates
摘要
近年來三維列印技術越來越普及且進步，且不斷在挑戰更高的製作精度及更快的列印速度。其中，立體微影技術亦持續挑戰印製更精細的微結構並達到更高的列印效率。然而，要在公分尺度之大面積上快速製作微米結構，在精密定位技術上仍有許多挑戰。光碟機裡的藍光讀取頭具有聚焦光點小、高頻寬、低成本之優勢，目前已被用於各種精密光學量測。本論文採用藍光讀取頭作為光固化光源，成功開發一基於極座標定位之立體微影系統。系統分別利用一主軸馬達以及步進滑台實現極座標中旋轉角度θ以及徑向位置r之定位。由於在極座標掃描中，主軸馬達不須改變旋轉方向，因此可達到較一般直角座標之逐線掃描模式更高之列印速度。實驗結果顯示所開發系統能穩定印出線寬在88.5至32.5 μm之間的圓弧線，在不穩定列印的情況下，最細線寬可以達到19 μm。在非連續線段列印測試中，θ方向單點最小長度為172 μm。掃描線速度可達35 mm/s，可列印最大面積為271.6 mm^2。
並列摘要
In recent years, three-dimensional printing technologies have become more and more popular and advanced, and the manufacturing accuracy and printing speed were improved continuously. Stereolithography is one of the printing technologies, which devotes to print finer microstructures with higher efficiency. However, high-speed printing of micro-structures on a centimeter scale area is still challenging. The Blu-ray optical pick-up unit(OPU) in the optical disc player has the advantages of small focusing spot, high bandwidth and low cost, which has been used for various precision optical measurements. In this thesis, a Blue-ray OPU was adopted as the light source to develop a stereolithography system based on polar coordinate positioning. In this system, a spindle motor and a stepping slide were used for the rotation angle θ and the radial position r positioning, respectively. By using the polar coordinate scanning, the spindle motor can rotate continuously without changing direction. Therefore, the polar coordinate scanning can achieve a higher printing speed than the line-by-line scanning mode in rectangular coordinates. The experimental results show that this system can stably print continuous curves with line widths between 88.5 and 32.5 μm. In the unstable case, the thinnest line width in r direction was 19 μm. In the test of discontinuous segments printing, the minimum segment length in θ direction was 172 μm. The maximum scanning linear speed and the printing area were 35 mm/s and 271.6 mm^2, respectively.