可模組化投影機最佳亮度光機系統的設計與分析研究

Abstract

在光學設計過程中，針對於市場不同的需求會衍生出不同的系統型態以達成所需的成像效能，但往往會增加光學系統的複雜度，不僅增加系統最佳化的難度，甚至會影響到系統的生產製作，光學設計與測試在光學實驗及工業上有不容忽視的重要性，先由電腦上執行設計及測試的模擬，可以預先了解系統的優劣，然後再架設實際的系統，可以達到事半功倍的效果，成像效能與結構參數複雜度間的拿捏，可以說是光學系統設計的技巧所在，更是智慧與經驗的累積。 DLP投影機的光機系統之設計優劣，會影響到投影品質的亮度、均勻度和對比度。投影畫面不外乎是強調均勻度與發光效率這兩項效能，而光機中的各個光學零件的效率與此兩效能有著極大的關係，若效率要高則生產組裝也相對的困難。因此，藉由光學設計軟體ZEMAX的模擬，取得數值平衡的最佳值，再搭配ASAP軟體的模擬藉以優化光學系統，光學設計模擬軟體在系統效能分析與最佳化設計有助於縮短光學系統的研發時程，並且能夠準確的計算出系統應有的效能。 本論文對投影顯示器的照明系統，提供了一個完整的設計流程，並提出了一個新的光機機構的設計概念，以使光機的生產與組裝過程更具量產性。首先，用幾何光學原理，推導照明系統模型中各光學元件規格的初始值；接著，使用ZEMAX 對已推導出的初始照明系統模型作優化，並用ASAP來對優化後的照明系統模型作驗證，接著以Pro/E 3D建構方式進行設計並實際製作、組裝與調整等相關功能測試，並探討投影機光機內不同光學零件對光照度分佈的影響，最後透過光機組裝後將實驗數據與模擬結果做比較，分析光機系統中真正會嚴重影響亮度的相關參數，並針對相關參數設計出一套燈的改良與調整機構.

In optics design process, in order to reach efficiency of the image must regarding the market to produce different design. But it will not only increase the design difficulty of the optics system but also effect the manufacture. It will depend on experience and wisdom of the designer to adjust the optical parameter. In this thesis, we studied and designed an new optical system of the DLP projection system. After determining the specification of components, we utilized etendue and geometric optical formula to get the basic structure of the illumination system, and used optical software ZEMAX to establish it. Later on, we chose a suitable projection lens and system structure for integrating the illumination system and the imaging system to accomplish the whole design and used optical software ASAP to optimize it. Projector will have perfect brightness uniformity and contrast if it has optimal optical design. We emphasize the uniformity and efficiency in the illumination system. It will have closely relation between optics component. As to that, it must get balance value by the ZEMAX and ASAP simulation. The software provide the analysis and optimum to decrease the design process and prevent the design bug. This thesis provides complete procedures to design the illumination system of the projector. Firstly, the initial illumination system module is derived by means of the optics principle of geometry. Secondly, the initial illumination system module is optimized by using ZEMAX and, the optimized module is confirmed with ASAP and design 3D layout with Pro/E. All function tests include made and assembled and adjustment will take to the design model. Finally we conclude the result of the experiment and simulation to find what optical parameter effect on the brightness of the projector. Then depend on the influential factor of the brightness we create the lamp adjust module for project device.