A long-distance detection/identification continuous zoom thermal imager based on MW MCT detector

Chen Jinjin; Su Junhong; Jin Ning; Pu Enchang; Zhang Hao; Su Junbo; Zhou Ligang; Ming Jingqian; Xu Man; Yang Kaiyu; Song Zhihang

doi:10.3788/IRLA201847.0404004

Large zooming ratio thermal imager based on medium-wave(MW) 640 pixel512 pixel(15m) MCT staring focal plane detector has been achieved. The thermal imager has wide field of 3528℃apacitating wide area surveillance by 35continuous zoom optical lens and the instantaneous field of view (IFOV) is 0.027 mrad/pixel. In the standard atmospheric conditions, this thermal imager can detect 4 m3 m2.3 m vehicles target at 55 km and can identify the same target at 15 km (identification probability of 50%). This high performance has met the needs of the modern long-distance photoelectric weapons system. There are four key techniques during the design of the high performance imager including zoom optical system design of smooth change roots compensation curve, the single rail/double slider zoom structure technology, adaptive servo control technology and infrared image enhancement technology. The image is always clear and has no breakpoint in the continuous zoom process of the whole large variable ratio. The excellent Minimum Resolvable Temperature Difference (MRTD) of this imager has been achieved at Nyquist frequency(18 cyc/mrad). Performance data and imager photos have been presented. Test results show that the thermal imager has good performance and the above four key techniques of the thermal imager have been achieved from the theory design to the machine system engineering research.

A long-distance detection/identification continuous zoom thermal imager based on MW MCT detector

1. Kunming Institute of Physics,Kunming 650223,China

Received Date: 2017-11-10

Rev Recd Date: 2017-12-20

Publish Date: 2018-04-25

Key words:

Abstract: Large zooming ratio thermal imager based on medium-wave(MW) 640 pixel512 pixel(15m) MCT staring focal plane detector has been achieved. The thermal imager has wide field of 3528℃apacitating wide area surveillance by 35continuous zoom optical lens and the instantaneous field of view (IFOV) is 0.027 mrad/pixel. In the standard atmospheric conditions, this thermal imager can detect 4 m3 m2.3 m vehicles target at 55 km and can identify the same target at 15 km (identification probability of 50%). This high performance has met the needs of the modern long-distance photoelectric weapons system. There are four key techniques during the design of the high performance imager including zoom optical system design of smooth change roots compensation curve, the single rail/double slider zoom structure technology, adaptive servo control technology and infrared image enhancement technology. The image is always clear and has no breakpoint in the continuous zoom process of the whole large variable ratio. The excellent Minimum Resolvable Temperature Difference (MRTD) of this imager has been achieved at Nyquist frequency(18 cyc/mrad). Performance data and imager photos have been presented. Test results show that the thermal imager has good performance and the above four key techniques of the thermal imager have been achieved from the theory design to the machine system engineering research.

HTML

Reference (17)

[1]	Johnson R B, Allen Mann. Compact infrared zoom lens for the 3-5m spectral band[C]//SPIE, 1996, 2774:181-192.
[2]	Zhang Liang, Liu Hongxia. Optical system design of long wave infrared zoom lens[J]. Infrared and Laser Engineering, 2011, 40(7):1279-1281. (in Chinese)
[3]	Thomas H Jamieson. Diffraction limited infrared zoom collimator[C]//SPIE, 1997, 3129:284235.
[4]	Hyun Sook Kim, Hang Woo Kim, Seok Min Hong. Compact mid-wavelength infrared zoom camera with 20:1 zoom range and automatic athermalization[J]. Optical Engineering, 2002, 41(7):1661-1667.
[5]	Mark C Sanson, James Cornell. MWIR continuous zoom with large zoom rang[C]//SPIE, 2010, 7660:1-12.
[6]	Wang Haitao. Cooled thermal imaging mid-wavelength infrared zoom camera[J]. Infrared Technology, 2007, 29(1):8-11. (in Chinese)
[7]	Gao Hongyun, Xiong Tao, Yang Changcheng, et al. Middle infrared continuous zoom optical system[J]. Optics and Precision Engineering, 2007, 15(7):1038-1043. (in Chinese)
[8]	Yang Weijin, Sun Qiang. Design of middle infrared continuous zoom system.[J]. Chinese Journal of Optics and Applied Optics, 2001, 3(2):164-169. (in Chinese)
[9]	Zhang Liang. Optical design for middle infrared zoom system[J]. Journal of Applied Optics, 2006, 27(1):32-34(in Chinese)
[10]	Li Yonggang, Zhang Bao, Ding Jinwei. Mechanism design of continuous infrared zoom lens[J]. Journal of Changchun University of Science and Technology, 2009, 32(1):60-63. (in Chinese)
[11]	Chen Jinjin, Jin Ning. High resolution middle infrared continuous zoom optical system with large zoom range.[J].Infrared and Laser Enginerring, 2013, 42(10):2742-2747. (in Chinese)
[12]	Tao Chunkan. Zoom Optics System Design[M]. Beijing:National Defense Industry Press, 1988:45-48. (in Chinese)
[13]	Li Lin. The Design Method of Modern Optics System[M]. Beijing:Beijing Institute of Technology Press, 2009. (in Chinese)
[14]	Jin Ning. Analysis of narcissus effect in scanning infrared systems[J]. Infrared Technology, 1998, 20(3):10-14. (in Chinese)
[15]	Zheng Jie, Chen Jie, Zhou Ligang. Model-free control of focus system in the infrared thermal imager[J]. Infrared and Laser Engineering, 2013, 42(S1):12-16. (in Chinese)
[16]	Wu Haibo, Liu Chao. Color image sharpening and processing based on Laplacian[J]. Converter Computer Development and Application, 2008, 21(9):27-28. (in Chinese)
[17]	Zhu Caigao. Infrared Image Enhancement Algorithm and DSP Implementation[M]. Nanjing:Nanjing University of Science and Technology, 2014:11-12. (in Chinese)

A long-distance detection/identification continuous zoom thermal imager based on MW MCT detector

doi: 10.3788/IRLA201847.0404004

Abstract

References

Proportional views

通讯作者: 陈斌, bchen63@163.com

Article Metrics

Related

Proportional views