摘要
为了在温度变化条件下对光电成像系统进行像质检测与评价,设计一种具有温度自适应功能的光学窗口。分析了温度变化对光学玻璃面形的影响,进行光学窗口的温度适应性光机结构设计,通过有限元分析与实测实验相结合的方法分析了温度变化对光学窗口面形的影响,验证了温度适应性设计的有效性。实验结果表明:常温20℃条件下,光学窗口波像差的PV值和RMS值分别为82.90 nm和6.96 nm;高温50℃条件下,波像差的PV值和RMS值分别为136.68 nm和14.55 nm;低温−40℃条件下,波像差的PV值和RMS值分别为183.51 nm和28.48 nm;高、低温环境下光学窗口的波像差与常温环境下结果对比的数值变化趋势与有限元分析结果具有较好的吻合性;在3种温度条件下光学窗口波像差的PV值均小于或接近(1/4)λ,且由于温度变化引起的光学窗口面形变化很小,设计的光学窗口具有较好的温度适应性。
In order to realize the image quality detection and evaluation of photoelectric imaging system under the condition of temperature change,an optical window with temperature adaptation function was designed.Firstly,the influence of temperature on the surface shape of optical glass was analyzed.Secondly,the temperature adaptability opto-mechanical structure of optical window was designed.Finally,the effect of temperature change on the surface shape of optical window was analyzed by means of finite element analysis and experiment,and the validity of temperature adaptability design was verified.The experimental results show that the peak-valley(PV)and root-mean-square(RMS)values of the wave aberration of optical window are 82.90 nm and 6.96 nm respectively at room temperature of 20℃,the PV and RMS values of the wave aberration are 136.68 nm and 14.55 nm respectively at high temperature of 50℃,and the PV and RMS values of the wave aberration are 183.51 nm and 28.48 nm respectively at low temperature of−40℃.Under high and low temperature conditions and compared with the room temperature condition,the numerical variation trend of wave aberration is in good agreement with the finite element analysis results.Under three temperature conditions,the PV values of the wave aberration of optical window are less than or close to(1/4)λ,and the change of the surface shape of optical window caused by the temperature change is very small.The designed optical window has better temperature adaptability.
作者
张磊
张松
王海伟
沙巍
宋子男
ZHANG Lei;ZHANG Song;WANG Haiwei;SHA Wei;SONG Zi'nan(Changchun Military Representative Office,Shenyang Military Representative Bureau of Army Equipment Department,Changchun 130000,China;Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)
出处
《应用光学》
CAS
CSCD
北大核心
2022年第1期30-35,共6页
Journal of Applied Optics
基金
军内科研计划项目(012016015800A22202)。
关键词
光学窗口
温度适应性
波像差
设计
实验
optical window
temperature adaptability
wave aberration
design
experiment
