【摘要】：為了提高遠距離紅外目標的探測能力,針對640pixel×512pixel紅外CCD探測器,分析溫度變化對光學系統(tǒng)的影響,設計出一種波長范圍為8μm~12μm紅外攝遠物鏡。系統(tǒng)采用折衍混合結構形式,焦距為200mm,相對孔徑為1:2.2,視場角為7°,具有體積小,結構緊湊的優(yōu)點。僅使用硫化鋅、硒化鋅和鍺3種材料以及4片透鏡實現(xiàn)了無熱化設計。應用Zemax對設計結果進行像質(zhì)評價,在-40℃~+60℃工作溫度范圍內(nèi),截止頻率為17lp/mm時各視場調(diào)制傳遞函數(shù)值超過0.4,達到衍射極限,像面穩(wěn)定,80%的能量集中在1個像元內(nèi),滿足光學系統(tǒng)的設計要求。
[Abstract]:In order to improve the detection ability of long range infrared target, the influence of temperature change on optical system is analyzed for 640pixel 脳 512pixel infrared CCD detector, and a target lens with a wavelength range of 8 渭 m ~ 12 渭 m is designed. The system adopts a hybrid structure with a focal length of 200mm, a relative aperture of 1: 2.2, and a field of view angle of 7 擄. The system has the advantages of small volume and compact structure. Only three kinds of materials, zinc sulphide, zinc selenide and germanium, as well as 4 lenses were used to realize the non-thermal design. Zemax is used to evaluate the image quality of the design results. In the range of -40 鈩，

本文編號：2267422