红外技术
紅外技術
홍외기술
INFRARED TECHNOLOGY
2015年
5期
374-379
,共6页
离轴反射系统%金属镜%柔性结构%Kinematic定位%有限元方法
離軸反射繫統%金屬鏡%柔性結構%Kinematic定位%有限元方法
리축반사계통%금속경%유성결구%Kinematic정위%유한원방법
off-axis system%metal mirror%flexure mount%Kinematic principle%FEM
随着单刃金刚石数控车削技术的不断提高，越来越多的红外系统选用金属作为反射镜材料以提高系统的性价比。同共轴光学系统相比，离轴光学系统的反射镜结构和装调更为复杂，为了深入研究金属反射镜在红外离轴系统中的应用，提出了一种集 Kinematic 定位和柔性去应力相结合的轻量化金属反射镜结构。首先从金属结构件的加工特点出发，分析了金属反射镜的轻量化形式和安装结构；接着针对某离轴反射系统中口径最大的离轴主镜，按照各设计要素建立了金属反射镜结构模型；最后采用有限元仿真分析方法，在各种工况下，对该主反射镜进行了详细的分析，结果均满足光学设计要求。
隨著單刃金剛石數控車削技術的不斷提高，越來越多的紅外繫統選用金屬作為反射鏡材料以提高繫統的性價比。同共軸光學繫統相比，離軸光學繫統的反射鏡結構和裝調更為複雜，為瞭深入研究金屬反射鏡在紅外離軸繫統中的應用，提齣瞭一種集 Kinematic 定位和柔性去應力相結閤的輕量化金屬反射鏡結構。首先從金屬結構件的加工特點齣髮，分析瞭金屬反射鏡的輕量化形式和安裝結構；接著針對某離軸反射繫統中口徑最大的離軸主鏡，按照各設計要素建立瞭金屬反射鏡結構模型；最後採用有限元倣真分析方法，在各種工況下，對該主反射鏡進行瞭詳細的分析，結果均滿足光學設計要求。
수착단인금강석수공차삭기술적불단제고，월래월다적홍외계통선용금속작위반사경재료이제고계통적성개비。동공축광학계통상비，리축광학계통적반사경결구화장조경위복잡，위료심입연구금속반사경재홍외리축계통중적응용，제출료일충집 Kinematic 정위화유성거응력상결합적경양화금속반사경결구。수선종금속결구건적가공특점출발，분석료금속반사경적경양화형식화안장결구；접착침대모리축반사계통중구경최대적리축주경，안조각설계요소건립료금속반사경결구모형；최후채용유한원방진분석방법，재각충공황하，대해주반사경진행료상세적분석，결과균만족광학설계요구。
With the development of numerical control SPDT(single-point diamond turning), more and more metal mirrors were applied to IR system for reducing the cost. Compared to coaxial system, the mirror mounting structure in IR off-axis system was more complex. As a new and effective option, a light-weight metal mirror with kinematic-locating and flexure-mounting structure was provided. Firstly, with the manufacture characters of metal parts taken into account, kinds of light-weight structures and mounting forms for metal mirror were introduced. Secondly, the model of a metal mirror with aperture of 316 mm for an IR off-axis system was provided. Thirdly, the metal mirror was analyzed in different load cases by FEM and the results satisfied the optical requirements.
