CAJ | 학술논문

介绍了一种摄远型长波红外消热差物镜的设计方法。将摄远物镜模型与消热差模型相结合，推导出之间的光焦度分配关系，并将二者统一起来，直接得到摄远型消热差物镜的光焦度分配关系式。首先，根据摄远物镜的设计方法进行物镜的设计，在满足远摄比的情况下结合像差理论合理选择最优的前组和后组光焦度解；然后采用光学被动消热差方法，进行消热差设计，选择材料组合，分配组元内部各透镜的光焦度；最后利用计算机辅助软件进行像差校正。为了验证该方案的可行性，设计了一个工作于8~12μm，焦距100 mm，F数为2.0，全视场角为6°，远摄比达到0.8的长波红外消热差光学系统。在-40~60℃温度范围内，成像质量稳定，调制传递函数(MTF)接近衍射极限，并且体积小、结构简单，质量轻。所设计系统优化后的光焦度分配值和初始计算值非常接近。
개소료일충섭원형장파홍외소열차물경적설계방법。장섭원물경모형여소열차모형상결합，추도출지간적광초도분배관계，병장이자통일기래，직접득도섭원형소열차물경적광초도분배관계식。수선，근거섭원물경적설계방법진행물경적설계，재만족원섭비적정황하결합상차이론합리선택최우적전조화후조광초도해；연후채용광학피동소열차방법，진행소열차설계，선택재료조합，분배조원내부각투경적광초도；최후이용계산궤보조연건진행상차교정。위료험증해방안적가행성，설계료일개공작우8~12μm，초거100 mm，F수위2.0，전시장각위6°，원섭비체도0.8적장파홍외소열차광학계통。재-40~60℃온도범위내，성상질량은정，조제전체함수(MTF)접근연사겁한，병차체적소、결구간단，질량경。소설계계통우화후적광초도분배치화초시계산치비상접근。
A method of athermal infrared telephoto objective was introduced in this paper. Telephoto lens model was combined with athermal model to find out and unify the relationship of focal power distribution. First, distribute the optical power of the fore group and the rear group on the basis of the principle of telephoto objective, choose the reasonable solution of the optical power of the two groups;then choose the appropriate material and distribute the optical power within each group to realize the ability of athermalization, finally computer﹣aided software was used to correct aberration. In order to prove the feasibility of the scheme, an athermal optical system was designed which works at 8- 12μm, the focal length of 100 mm, F number is 2, and total length of the telephoto objective is 80 mm. The environment temperature analysis shows that the optical system has stable imaging quality, MTF is close to diffraction limit, the optical system has the character of small volume, simple structure and light. The optical power of optimized results were near the calculated results.