本文選題：微投影顯示　切入點：硅基液晶　出處：《哈爾濱工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：微投影顯示技術(shù)已經(jīng)廣泛應(yīng)用于商業(yè)化生產(chǎn)中,受到大眾消費市場的青睞。目前,該技術(shù)正朝著高亮度、高均勻性、高分辨率、長壽命以及小體積的方向發(fā)展。LCo S(Liguid Crystal on Silicon)作為一種常用的空間光調(diào)制器,其只能被偏振光點亮,對于入射的自然光就會造成一半以上的能量損失。為了提高照明系統(tǒng)的能量利用率,本文提出一種基于方棒的偏振光復(fù)用方法,并完成整體光學(xué)引擎的設(shè)計及性能分析工作。首先,對目前常用的幾種偏振光復(fù)用方法進(jìn)行原理性分析,總結(jié)利弊,針對其弊端提出一種基于方棒的偏振光復(fù)用方法。闡述其工作原理,并以虛光源陣列以及方棒的擴(kuò)展量為理論基礎(chǔ),分析方棒的最佳尺寸,使得在方棒的出射端獲得高效而均勻的光束。依據(jù)其工作原理,完成對偏振轉(zhuǎn)化系統(tǒng)PCS(Polarization Conversion System)的結(jié)構(gòu)設(shè)計。其次,將該偏振光復(fù)用方法應(yīng)用于照明光學(xué)系統(tǒng)的設(shè)計中,主要完成分束系統(tǒng)和會聚系統(tǒng)的設(shè)計。其中,分束系統(tǒng)的作用是將方棒所形成的虛光源陣列對應(yīng)成像到PCS元件上;會聚系統(tǒng)的作用是將經(jīng)偏振轉(zhuǎn)化后的光束進(jìn)行會聚,使之與LCo S照明面相匹配。最后,完成投影光學(xué)系統(tǒng)的設(shè)計和光學(xué)引擎的整體性能分析。首先確定了投影光學(xué)系統(tǒng)的的參數(shù)指標(biāo),選擇初始結(jié)構(gòu),利用Zemax軟件完成投影系統(tǒng)的光學(xué)設(shè)計。之后,對該系統(tǒng)的成像質(zhì)量進(jìn)行評價,設(shè)計結(jié)果滿足系統(tǒng)要求,并完成光學(xué)系統(tǒng)的公差分析。最后在TracePro分析軟件中對所設(shè)計的光學(xué)引擎進(jìn)行建模,得到LCoS顯示芯片以及投影屏幕上的照度分布圖。分析結(jié)果表明,到達(dá)LCo S芯片以及投影屏幕上的能量利用率分別為67%和63%,通過9點ANSI方法計算得到投影屏幕上的照度均勻性為95%。由此得知,這種基于方棒的偏振光復(fù)用方法能夠在保證照度均勻性的同時,有效提高照明系統(tǒng)的能量利用率。
[Abstract]:Micro-projection display technology has been widely used in commercial production and has been favored by the mass consumer market. At present, the technology is moving towards high brightness, high uniformity and high resolution. Long life and small volume development. LCo Sliguid Crystal on Silicon, as a commonly used spatial light modulator, can only be lit by polarized light. In order to improve the energy efficiency of lighting system, a method of polarized light multiplexing based on square rod is proposed in this paper, in order to improve the energy efficiency of lighting system, more than half of the energy loss will be caused by the incident natural light. The design and performance analysis of the whole optical engine are completed. Firstly, several commonly used polarizing light multiplexing methods are analyzed in principle, and the advantages and disadvantages are summarized. In view of its disadvantages, a method of polarized light multiplexing based on square rod is proposed. The working principle of the method is expounded, and the optimum size of square rod is analyzed based on the theory of virtual light source array and the expansion of square rod. According to its working principle, the structure design of polarization conversion system (PCS(Polarization Conversion system) is completed. Secondly, the method of polarization multiplexing is applied to the design of illumination optical system. The design of beam splitting system and convergence system is mainly completed. The function of beam splitting system is to image the virtual light source array formed by square rod onto PCS element, and the function of convergence system is to converge the polarized light beam. Finally, the design of the projection optics system and the analysis of the overall performance of the optical engine are completed. First, the parameters of the projection optics system are determined, and the initial structure is selected. The optical design of the projection system is completed by using Zemax software. After that, the imaging quality of the system is evaluated, and the design results meet the requirements of the system. Finally, the designed optical engine is modeled in the TracePro analysis software, and the illumination distribution on the LCoS display chip and the projection screen is obtained. The analysis results show that, The energy efficiency reached the LCo S chip and the projection screen were 67% and 63, respectively. The illumination uniformity on the projection screen was calculated by 9 points ANSI method. This method of polarization multiplexing based on square bar can effectively improve the energy efficiency of lighting system while ensuring the uniformity of illumination.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN27

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