Browse > Article
http://dx.doi.org/10.3807/KJOP.2005.16.4.354

Advanced LWIR Thermal Imaging System with a Large Zoom Optics  

Hong, Seok-Min (Agency for Defence Development P.O)
Kim, Hyun-Sook (Agency for Defence Development P.O)
Publication Information
Korean Journal of Optics and Photonics / v.16, no.4, 2005 , pp. 354-360 More about this Journal
Abstract
A high performance LWIR(long wavelength infra red) zoom thermal imaging sensor using $480{\times}6$ HgCdTe(MCT) linear detector has been developed by ADD Korea. The optical system consists of zoom telescope having large objective about 190 mm diameter and optically well corrected scanning system. The zoom ratio of the telescope is 3: 1 and its magnification change is performed by moving two lens groups. And also these moving groups are used for athermalization of the system. It is certain that the zoom sensor can be used in wide operating temperature range without any degradation of the system performance. Especially, the sensor image can be displayed with the HDTV(high definition television) format of which aspect ratio is 16:9. In case of HDTV format, the scanning system is able to display 620,000 pixels. This function can make wider horizontal field of view without any loss of performance than the normal TV format image. The MRTD(minimum resolvable temperature difference) of the LWIR thermal imaging sensor shows good results below 0.04 K at spatial frequency 2 cycles/mrad and 0.23 K at spatial frequency 8 cycles/mrad at the narrow field of view.
Keywords
열상장비;원적외선;줌 광학계;최소분해가능온도차;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 J. L. Miller, Principles of Infrared Technology, Van Nostrand Reinhold, New York, pp. 3-51, 1994
2 J. T. Woolaway, 'New sensor technology for the 3 to $5\;{\mu}m$ imaing band,' Photonics Spectra, pp. 113-119 Feb. 1991
3 T. Meitzler, 'A comparision of the performance of 3-5 and $8-12\;{\mu}m$ infrared camera,' Proc. SPIE 2224, pp. 22-29,1994   DOI
4 R. B. Jhonson, 'Relative merits of the $3-5\;{\mu}m$ and $8-12^*\;{\mu}m$ spectral bands,' Proc. SPIE 915, pp. 106-115, 1988
5 김창우, 김현숙, 홍석민, 김재기, '열상장비용 직병렬 주사광학계,' 한국광학회지, vol. 5, no. 2, pp. 212-216, 1994
6 J. M. Loyd, Thermal Imaging Systems, Plenum Press, New York, pp. 212-368, 1975
7 S. M. Hong et. aI., 'Advanced thermal imaging system for tank sight,' Proc. SPIE 5783, pp. 932-942, 2005   DOI
8 G. Gaussorgues, Infrared Thermography, Chapman & Hall, London, pp. 1-60, 1994
9 홍석민외, '직병렬 주사방식 열상장비의 설계 및 제작,' 응용물리, 제8권, 제3호, pp. 289-295, 1995
10 H. S. Kim, C. W. Kim, and S. M. Hong, 'Compact midwavelength infrared zoom camera with 20:1 zoom range and automatic atherma1ization,' Optical Engineering, vol. 41(7), pp. 1661-1667, 2002   DOI   ScienceOn
11 홍석민, 김현숙, 박용찬, '원적외선 2세대 열상조준경의 설계,' 한국광학회지, vol. 16, no. 3, 2005
12 R E. Fischer, B. Tadie-Galeb, Optical system design, McGrawHill, New York, 2000
13 R. Simmons, 'Athennalisation of a fast infrared telescope objective,' Proc. SPIE 2539, 137-149, 1995
14 A. Mann, Infrared optics and zoom lenses, SPIE Press, chap.3, p. 28-30, 1996
15 M. J. Riedl, Optical design fundamentals for Infrared systems, SPIE press, 1995
16 홍석민외, '$320{\times}240$ 적외선 검출기를 이용한 열상센서 설계,' 한국광학회지, vol. 15, no. 5, pp. 423-428, 2004
17 홍석민, 유위경, 윤은숙, '열상잘비의 실시간 영상 신호처리,' 한국군사과학기술학회지, 제7권, 제4호, pp. 79-86, 2004