CAJ | 학술논문

光学仪器的工作环境温度变化范围大，温度变化时光学元件的曲率、厚度和间隔都将发生变化，同时光学材料的折射率和所在介质的折射率也将发生变化，影响光学系统的成像质量。文中采用光学被动补偿方式，针对1920×1080分辨率的高清可见光CCD，设计了焦距12 mm，F数为4，视场角为57.5°，工作温度范围-40℃～+80℃的消热差光学系统。设计结果表明，在整个工作温度范围内，系统成像质量良好，MTF接近衍射极限。
광학의기적공작배경온도변화범위대，온도변화시광학원건적곡솔、후도화간격도장발생변화，동시광학재료적절사솔화소재개질적절사솔야장발생변화，영향광학계통적성상질량。문중채용광학피동보상방식，침대1920×1080분변솔적고청가견광CCD，설계료초거12 mm，F수위4，시장각위57.5°，공작온도범위-40℃～+80℃적소열차광학계통。설계결과표명，재정개공작온도범위내，계통성상질량량호，MTF접근연사겁한。
Most aerospace optical instruments are expected to perform over a wide temperature range. The change in temperature will cause not only the change of the curvature of optical elements as well as the refractive in?dex, but also the change of the defocus of the image surface and therefore the degradation of performance. Based on adopted optical compensation method and with 1 920 × 1 080 visible high-definition CCD, an athermalized optical system working at-40℃~+80℃is designed. The focal length of optical system is 12 mm, the F number is 4, and the field of view is 57.5. The results show that the system has a good imaging quality and the modulation transfer function (MTF) for spatial frequency is closed to the diffraction limitation over the temperature range.