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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2024.8
- 수록면
- 366 - 374 (9page)
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초록· 키워드
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This paper presents an optimum method for determining the parameters to athermalize a long-wave-length infrared (LWIR) zoom camera by introducing the defocus sensitivity analysis. To effectively find parameters that significantly affect thermal defocus, we simulated athermal analysis with temperature changes for all variables. Consequently, we found that the optimum parameter to correct thermal defocus is the compensation lens, and its movements with temperature at each zoom position are obtained from the simulated athermal analysis. To verify the efficiency of our athermal approach, we performed actual athermal tests in a broad temperature range at each zoom position. The simulated athermal analysis provides the initial position of the compensation lens at the corresponding temperature and zoom position. Then the compensation lens is elaboratively moved to serve the highest live contrast ratio (LCR) for the target. This experiment shows that the compensation lens locations in the actual test are closely matched to those in the simulated athermal analysis. In addition, two outdoor tests conducted in two different environments confirm that the autofocus system suggested in this study performs well at all zoom positions. Using the proposed athermal analysis approach in this paper, we efficiently realize an athermal system over the specified temperature and zoom ranges.
목차
I. INTRODUCTION
II. AN OPTICAL DESIGN FOR A 3× LWIR ZOOM SYSTEM
III. ATHERMAL ANALYSIS
IV. H/W AND S/W FOR THE AUTOFOCUSING MECHANISM
V. ATHERMAL TEST
VI. OUTDOOR TESTS
VII. CONCLUSION
REFERENCES
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