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1、國外已經(jīng)將基于數(shù)字微鏡器件(DMD)的動態(tài)紅外景象投影技術(shù)應(yīng)用于紅外成像制導(dǎo)仿真系統(tǒng)。該技術(shù)采用二進制脈寬調(diào)制技術(shù)來控制生成的紅外景象的灰度級,它能夠產(chǎn)生高空間分辨率、高幀頻、無死像元、均勻性極好的紅外景象。本文針對動態(tài)紅外景象投影技術(shù)在雙色紅外成像制導(dǎo)仿真中的問題,設(shè)計寬波段且滿足導(dǎo)引頭特性要求的光學(xué)系統(tǒng)。
本文首先介紹了DMD動態(tài)紅外景象投影系統(tǒng)的構(gòu)成及其基本原理,闡述了其核心器件DMD的結(jié)構(gòu)和工作原理,并對單片DLP
2、系統(tǒng)做了簡要介紹:分析了DMD紅外景象投影技術(shù)的優(yōu)勢,并討論了其關(guān)鍵技術(shù),如短暫假信號、微鏡衍射限制動態(tài)范圍、DMD光學(xué)窗口的光譜透射問題等。
結(jié)合被測導(dǎo)引頭參數(shù)和DMD參數(shù)分析了投影系統(tǒng)的設(shè)計參數(shù)及指標,應(yīng)用光學(xué)設(shè)計軟件ZEMAX,采用折.衍混合的方法設(shè)計了一種雙波段紅外投影物鏡,工作波段為3~5μm和8~12μm,F數(shù)為3.2,半視場1.3°。并對設(shè)計完成的物鏡進行了MTF分析、畸變分析等,對系統(tǒng)能量進行了核算,各項指
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