本論文主要在研究使用雷射為光源之微型投影機的光機設計。微型雷射投影機技術主要包含兩個方向，一、採用雙軸微機電系統之掃描鏡為空間光調製器之嵌入式微型雷射投影機技術，二、採用LCD/DMD/ LCOS微型面板為空間解調器之微型雷射投影技術，因此本研究主要分成兩部份： 第一部份，利用單一紅光He-Ne雷射當光源，搭配一微機電系統，驗證微型投影機的可行性，其技術原理在於將光源，集中在二維可致動微型反射鏡，進行X、Y軸的掃描經電子控制後投射出影像，直接由雷射光源處控制灰階，並由外部電路修正掃描光路以及雷射光源的發射時間，因此並不需要額外的光學投影引擎。 第二部分，使用LCD、DMD 或LCOS 微型面板為空間解調器之微型雷射投影機，係將RGB 雷射光束擴大到能均勻照明空間解調器且保持合理的準直性，用來照明 LCD/DMD/LCOS，再投影出畫面。本研究主要針對一個微型雷射二極體投影系統所需之微型聚光鏡進行設計，首先利用自建程式找出聚光鏡之較佳參數數據，再使用光學分析軟體進行照明分析。由於目前只有紅光雷射二極體產品較為成熟，此處針對紅光光源資料設計紅光微型聚光鏡。實驗結果光使用效率：46.2% 、均勻度：85.7%， X 軸半強角:2.42°，Y 軸半強角:2.08°。此設計技術建立後，對於藍綠光雷射二極體亦能快速設計出其微型聚光鏡。 This thesis mainly explored the optomechanical design of the mini-projector by using lasers as the light source. The major technologies of the miniature laser projector include: (1) the technology by applied the 2-D MEMS Scanning Mirrors as a modulating device of space for the embedded miniature laser projector; (2) the technology by applied the LCD/DMD/LCOS miniature panel as the space demodulator for the miniature laser projection. The following researches will be concentrated on these two technologies. The first direction of the research is by using a red-light He-Ne laser as the light source and by allocating with the MEMS to verify the feasibility of the mini-projector. The principle of technology is to concentrate the light source on the 2-D MEMS Scanning Mirrors. The images will then be projected with the electrical control of the X- and Y-axis scanning. This technology do not need extra optical projected engine due to the gray scales of the images were directly controlled by the laser light source and that the scanning optical path and launch time of the light source were corrected by external circuits. The second direction of research is to use the LCD/DMD/LCOS miniature panel as a space demodulator for the miniature laser projector. The projection of the images is by expanding the light beams of RGB lasers to uniformly launch on the space demodulator and by maintaining the collimation to illuminate the LCD/DMD/LCOS. This research primarily works on the design of micro-condenser lens for the miniature laser diode projection system. Firstly, the optimum data of parameters were obtained by utilizing the self-established program, then substituted into the ASAP (software for optical analysis) to simulate the illumination. Because the red-light laser diodes are well-developed commercial products, we focus on the red-light source for designing the micro-condenser lens. The best results were obtained with 46.2% of power efficiency, 85.7% of illumination uniformity, 2.42 degrees of full angle at the half maximum for the luminous intensity of X-axis, and 2.08 degrees of full angle at the half maximum for the luminous intensity of Y-axis. This established design techniques can be also extended to the design of micro-condenser lens for the blue and green laser diodes.
