筆型光學滑鼠之設計

Abstract

筆型光學滑鼠以光學滑鼠成像概念為基礎，外型為筆型之設計。與傳統光學滑鼠之主要差異在於照明元件採用同軸照明設計（Co-axial illumination），優點是重量體積較一般光學滑鼠輕薄，並且方便攜帶。採用藍芽無線技術使得操作方便，以及根據設計，適用於大部份材質上。因目前市面上筆滑鼠體積仍稍嫌略大，體積無法與一般用筆相比擬；另外，市面上的設計皆利用一般型發光二極體，消耗功率較多，為了節省成本與節約能源，本論文嘗試使用黏著型發光二極體 （SMD LED, Surface-mount device Light-emitting Diode）發光元件，此類元件體積較小，重量減輕，消耗功率較少，成本亦比一般型LED較低。本篇論文利用新思科技公司（Synopsys, Inc.）之光學軟體CODE V設計模擬成像系統的部分，以及利用Light tools設計模擬非成像系統的部分。從成像到非成像元件及機構設計著手，且針對使用端進行長景深公差分析，最後設計一更加輕薄與更加節能之筆型光學滑鼠產品。

The pen-type optical mouse is an innovative mouse design which based on the principle of original optical imaging theory but it reduces the volume of mechanism much smaller to be pen-shape. In the thesis, it presents the design of “co-axial” illumination device to improve the size problem and to arise the MTF performance of imaging lens in the meantime. Besides, taking the problems of economizing power and cost into consideration, this thesis uses the SMD LED (Surface-mount device Light-emitting diode) for its smaller size, lower power loss, and besides, the cost is lower than the general LED. In another part, the imaging lens takes the concepts of depth of focus into design for its long hyperfocal distance application. To confirm the accuracy, this thesis presents the tolerance analysis of depth of field versus MTF, the tilted angle versus imaging performance and the tolerance analysis of uniformity and efficiency of the illumination part.