折/衍共口径红外双波段位标指示器光学系统设计
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摘要
针对反射式双模位标指示器视场小、中心遮拦、能量低等问题,提出一种折/衍共口径红外双波段位标指示器光学系统。基于消色差理论和MRTD模型分别推导了光学系统波段间消色差公式和作用距离方程。设计的双波段光学系统具有共焦距特性,从而实现了双波段同步探测以及识别目标信息的一致性。折/衍共口径红外双波段位标指示器光学系统工作波长为3.4～4.8μm、7.7～9.5μm,俯仰、偏航视场为-26°～26°,焦距115 mm,F数为2。结果表明:在-40～60℃温度范围内消热差,成像质量接近衍射极限。
Aiming at the problem of small-field, central obscuration and low anergy of reflective optical system, the dual-mode beam positioner optical system of a folded/diffractive co-aperture infrared dual-band positioner was proposed. Based on achromatic theory and MRTD model, the equations of wavelength band achromaticity and action distance were deduced, respectively. With the property of a common focal length in the dual-band optical system, dual-band simultaneous detection and consistency of target information identification were achieved. The parameters of the folded/diffractive co-aperture infrared dual-band positioner optical system were as follows : wavelengths are 3. 4-4. 8 μm and 7. 7-9.5 μm, pitch/yaw is -26°-26°. focal length is 115 mm and F number is 2. The results show that thermal difference eliminated in the temperature range of-40-60 ℃, the optical transfer function is close to the diffraction limit.
Aiming at the problem of small-field, central obscuration and low anergy of reflective optical system, the dual-mode beam positioner optical system of a folded/diffractive co-aperture infrared dual-band positioner was proposed. Based on achromatic theory and MRTD model, the equations of wavelength band achromaticity and action distance were deduced, respectively. With the property of a common focal length in the dual-band optical system, dual-band simultaneous detection and consistency of target information identification were achieved. The parameters of the folded/diffractive co-aperture infrared dual-band positioner optical system were as follows : wavelengths are 3. 4-4. 8 μm and 7. 7-9.5 μm, pitch/yaw is -26°-26°. focal length is 115 mm and F number is 2. The results show that thermal difference eliminated in the temperature range of-40-60 ℃, the optical transfer function is close to the diffraction limit.
引文
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[3] Sun Chiquan, Zhao Wei, Meng Junhe, et al. Infrared optical system design for yawing seeker[J]. Infrared and Laser Engineering, 2017, 46(2):0204005.(in Chinese)
[4] Sun Hongyu. Compact folding/diffusion middle wave infrared thermal imaging optical system[J]. Optoelectronics Technology, 2016, 31(3):20-24.
[5] Yin Xiaochen, Fu Yanhui. Design of infrared/laser common aperture dual mode seeker optical system[J]. Infrared and Laser Engineering, 2015, 44(2):428-431.(in Chinese)
[6] Tao Yi, Wang Min, Xiao Weijun, et al. Design of an infrared dual-band optical system with an adiabatic difference in the large field of view of folded/branched hybrid[J]. Acta Photonica Sinica, 2017(11):189-197.
[7] Gao Huaiping, Wu Ping, Zhang Lishuai. Research on the influence of detection conditions on MRTD of infrared thermal imaging system[J]. Laser&Infrared, 2016, 46(1):67-71.(in Chinese)
[8] Lu Xiaofei, Sheng Jie. Research progress on surface temperature of ballistic missile during flight[J]. Infrared,2016, 37(1):1-6.
[9] Chatterjee S, Purkait P K, Garg D. Athermalization of infrared camera of projectile weapons[J]. Applied Thermal Engineering, 2009, 29(10):2106-2112.
[10] Jiang Lun, Hu Yuan, Dong Scientific Research, et al. Passive athermalization design of infrared dual-band optical systems[J]. Infrared and Laser Engineering, 2015, 44(11):3353-3357.(in Chinese)
[11] Cheng Ximin. Processing and inspection of diffractive elements in infrared optical lenses[D]. Beijing:Beijing University of Chinese Academy of Sciences, 2015.(in Chinese)
[12] Gong Hao. Study on diffraction efficiency and processing error of infrared diffractive optical elements[D]. Changchun:Changchun University of Science and Technology, 2016.(in Chinese)
[2] Mao Yankai, Qiu Zhenan, Luo Jinping, et al. Simulation of common aperture IR/laser compound seeker system simulation[J]. Electrooptics and Control, 2018, 25(1):19-22.(in Chinese)
[3] Sun Chiquan, Zhao Wei, Meng Junhe, et al. Infrared optical system design for yawing seeker[J]. Infrared and Laser Engineering, 2017, 46(2):0204005.(in Chinese)
[4] Sun Hongyu. Compact folding/diffusion middle wave infrared thermal imaging optical system[J]. Optoelectronics Technology, 2016, 31(3):20-24.
[5] Yin Xiaochen, Fu Yanhui. Design of infrared/laser common aperture dual mode seeker optical system[J]. Infrared and Laser Engineering, 2015, 44(2):428-431.(in Chinese)
[6] Tao Yi, Wang Min, Xiao Weijun, et al. Design of an infrared dual-band optical system with an adiabatic difference in the large field of view of folded/branched hybrid[J]. Acta Photonica Sinica, 2017(11):189-197.
[7] Gao Huaiping, Wu Ping, Zhang Lishuai. Research on the influence of detection conditions on MRTD of infrared thermal imaging system[J]. Laser&Infrared, 2016, 46(1):67-71.(in Chinese)
[8] Lu Xiaofei, Sheng Jie. Research progress on surface temperature of ballistic missile during flight[J]. Infrared,2016, 37(1):1-6.
[9] Chatterjee S, Purkait P K, Garg D. Athermalization of infrared camera of projectile weapons[J]. Applied Thermal Engineering, 2009, 29(10):2106-2112.
[10] Jiang Lun, Hu Yuan, Dong Scientific Research, et al. Passive athermalization design of infrared dual-band optical systems[J]. Infrared and Laser Engineering, 2015, 44(11):3353-3357.(in Chinese)
[11] Cheng Ximin. Processing and inspection of diffractive elements in infrared optical lenses[D]. Beijing:Beijing University of Chinese Academy of Sciences, 2015.(in Chinese)
[12] Gong Hao. Study on diffraction efficiency and processing error of infrared diffractive optical elements[D]. Changchun:Changchun University of Science and Technology, 2016.(in Chinese)