中波紅外光學系統(tǒng)無熱化設(shè)計和冷反射抑制
發(fā)布時間：2018-09-11 16:45
【摘要】：為了得到性能好、穩(wěn)定性高,能夠滿足民用、軍事等領(lǐng)域應用的中波紅外成像光學系統(tǒng),采用光學被動式的無熱化技術(shù),在常溫下像質(zhì)良好的初始結(jié)構(gòu)基礎(chǔ)上,通過對不同紅外材料組合,實現(xiàn)系統(tǒng)的無熱化設(shè)計。利用等效溫差(NITD)計算冷反射貢獻量,對冷反射貢獻量較大表面的曲率和光焦度進行優(yōu)化。設(shè)計結(jié)果表明:在-40℃~60℃溫度范圍內(nèi),光學系統(tǒng)的MTF在30lp/mm處均大于0.5;離焦量在一倍焦深以內(nèi),點列圖(RMS)直徑小于像元尺寸;冷反射殘存量最大的表面NITD值降低40%。應用該方法可以很好地實現(xiàn)紅外成像光學系統(tǒng)的無熱化設(shè)計,對冷反射的抑制效果明顯。
[Abstract]:In order to obtain a medium wave infrared imaging optical system with good performance and high stability, which can be used in civil, military and other fields, an optical passive non-thermal technique is adopted, on the basis of a good initial structure with good image quality at room temperature. The non-thermal design of the system is realized by combining different infrared materials. The equivalent temperature difference (NITD) is used to calculate the cold reflection contribution, and the curvature and the light focus of the surface with large cold reflection contribution are optimized. The design results show that in the temperature range of -40 鈩，
本文編號：2237255
[Abstract]:In order to obtain a medium wave infrared imaging optical system with good performance and high stability, which can be used in civil, military and other fields, an optical passive non-thermal technique is adopted, on the basis of a good initial structure with good image quality at room temperature. The non-thermal design of the system is realized by combining different infrared materials. The equivalent temperature difference (NITD) is used to calculate the cold reflection contribution, and the curvature and the light focus of the surface with large cold reflection contribution are optimized. The design results show that in the temperature range of -40 鈩，
本文編號：2237255
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