摘要
为了满足全天候观察的需求,设计了波段范围为可见光-短波红外宽光谱共焦光学成像系统。根据宽光谱共焦原理以及光学被动式无热化原理,设计了一个波段范围为0.4μm~2.5μm、焦距数为50 mm,F数为2.8的光学成像系统,该系统在可见光波段在奈奎斯特频率为30 lp/mm时传函值高于0.7,红外波段在奈奎斯特频率为30 lp/mm时传函值高于0.5,探测器选用为15μm×15μm、像元数为640 pixel×512 pixel碲镉汞探测器。该宽光谱共焦型光学系统均采用普通玻璃材料以及易加工的球面透镜,在温度范围-40℃~+60℃内对光学系统消热差,实现了无需调焦即可满足昼夜观察的使用需求,可广泛应用于安防监控、森林防火等领域。
In order to meet the requirement of all-weather observation,a confocal optical imaging system with a band range of visible-short-wave infrared wide spectrum is designed.Based on the principle of wide spectral confocal and passive anthermalization of optics,an optical imaging system with a band range of 0.4~2.5μm,a focal length of 50mm and an F number of 2.8 is designed.The transmission value of the system is higher than 0.7 when the Nyquist frequency is 30lp/mm in the visible band.In the infrared band,the function value is higher than 0.5 when Nyquist frequency is 30lp/mm.The detector is 15μm×15μm and the pixel number is 640 pixel×512 pixel.The wide spectrum confocal optical system adopts common glass materials and easy to process spherical lenses,which can eliminate thermal difference of the optical system within the temperature range of-40~+60℃,realizing the need for day and night observation without focusing,and can be widely used in security monitoring,forest fire prevention and other fields.
作者
李萍
刘欢
LI Ping;LIU Huan(Xi’an University of Technology,College of Photoelectric Engineering,Xi’an 710021,China)
出处
《自动化与仪器仪表》
2023年第9期241-246,共6页
Automation & Instrumentation
