本文關(guān)鍵詞： 目標模擬技術(shù) 紅外雙波段 像素融合法 亞波長光柵 光學系統(tǒng)設(shè)計 雜散輻射分析　出處：《哈爾濱工業(yè)大學》2015年碩士論文　論文類型：學位論文

【摘要】：紅外雙波段目標模擬技術(shù)是目前評價紅外制導系統(tǒng)各項性能指標最有效的方法之一,它主要通過生成可調(diào)諧的雙波段的能量比值來模擬真實的目標景象。亞波長光柵具有窄帶、高衍射效率、強波長敏感性等特點,成為目前紅外濾光器件研究的重點。本文主要研究內(nèi)容是對基于像素融合法的紅外雙波段目標模擬技術(shù)進行分析,并針對特定探測器完成其中幾個關(guān)鍵部分的結(jié)構(gòu)設(shè)計。首先通過對國內(nèi)外現(xiàn)有的目標模擬器設(shè)計現(xiàn)狀進行調(diào)研,分析它們的優(yōu)勢和不足,進而對一種“基于像素融合法”新型設(shè)計方案進行說明,解釋像素融合法的工作原理并對其中的關(guān)鍵技術(shù)進行分解,并對其進行逐一分析。關(guān)鍵技術(shù)主要包括三項:景象生成技術(shù)、亞波長光柵濾波技術(shù)和投影技術(shù)。其次,使用嚴格耦合波理論,對亞波長光柵的透過率方程進行推導,得到光柵透射率與光柵參數(shù)之間的數(shù)學關(guān)系,通過軟件編程進行程序設(shè)計,分析不同光柵參數(shù)下光柵的濾波效果,并根據(jù)探測器的雙波段探測需求設(shè)計相應(yīng)的光柵結(jié)構(gòu),給出了設(shè)計方法,完成3.4~3.6μm和4.3~4.5μm紅外雙波段馬賽克結(jié)構(gòu)的濾光片設(shè)計,并給出濾光片相應(yīng)的制作方案。再次,根據(jù)探測導引頭和電阻陣列的技術(shù)指標,提出投影光學系統(tǒng)的設(shè)計參數(shù),使用Zemax軟件優(yōu)化設(shè)計出一種二次成像式的投影物鏡,其中入瞳直徑75mm,視場角約為2.2°,焦距240mm,雙波段為3.4~3.6μm和4.3~4.5μm,然后對投影物鏡完成圖像質(zhì)量評價和公差分析。最后,設(shè)計投影系統(tǒng)的光機結(jié)構(gòu),對投影系統(tǒng)進行雜散輻射分析。雜散輻射分析主要包括朗伯輻射分析,鬼像分析和內(nèi)雜光分析。最終,檢結(jié)結(jié)果顯示設(shè)計滿足要求。
[Abstract]:The infrared dual-band target simulation technique is one of the most effective methods to evaluate the performance of infrared guidance system. It simulates the real target scene mainly by generating the tunable dual-band energy ratio. The sub-wavelength grating has narrow band. The characteristics of high diffraction efficiency and strong wavelength sensitivity have become the focus of the research on infrared filter devices. The main content of this paper is to analyze the infrared dual-band target simulation technology based on pixel fusion method. At the same time, the structure design of several key parts of the special detector is completed. Firstly, through the investigation of the present situation of target simulator design at home and abroad, the advantages and disadvantages are analyzed. Then it explains a new design scheme based on pixel fusion, explains the principle of pixel fusion and decomposes the key technology. The key techniques include scene generation technology, subwavelength grating filtering technique and projection technique. Secondly, the transmission equation of subwavelength grating is derived by using strictly coupled wave theory. The mathematical relationship between the grating transmittance and the grating parameters is obtained. The filtering effect of the grating under different grating parameters is analyzed by software programming, and the corresponding grating structure is designed according to the dual-band detection requirements of the detector. The design method is given, the filter design of 3.4N 3.6 渭 m and 4.3N 4.5 渭 m infrared double band mosaic structure is completed, and the corresponding fabrication scheme of the filter is given. Thirdly, according to the technical index of detecting seeker and resistor array, The design parameters of the projective optical system are presented, and a kind of projection objective with secondary imaging is optimized by using Zemax software. The diameter of the pupil is 75 mm, the angle of view is about 2.2 擄, the focal length is 240 mm, the dual band is 3.43.6 渭 m and 4.3N 4.5 渭 m, then the image quality evaluation and tolerance analysis are completed for the projection objective lens. Finally, the optical mechanical structure of the projection system is designed. Stray radiation analysis of projection system. Stray radiation analysis mainly includes Lambert radiation analysis, ghost image analysis and internal clutter analysis. Finally, the results show that the design meets the requirements.
【學位授予單位】：哈爾濱工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN219

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