Optimization of slit width on shutter for aerial camera

ZHANG Lei; DING Ya-lin; JIANG Gui-de; ZHANG Shu-qing; XU Yong-sen

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Optimization of slit width on shutter for aerial camera

Article | 更新时间：2020-08-12

- Optimization of slit width on shutter for aerial camera
- Optics and Precision Engineering Vol. 17, Issue 1, Pages: 196-201(2009)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所,吉林长春,中国,130033
  2. 中国科学院研究生院北京,100039
  3. 93313部队,吉林长春,130111
- 作者简介：
- 基金信息：
- DOI：
  CLC： V248.3;TB869
- Received：03 March 2008，
  
  Revised：29 May 2008，
  
  Published：2009
- 稿件说明：
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张雷, 丁亚林, 蒋贵德, 张树青, 许永森. 航摄快门帘缝宽度的优化[J]. 光学精密工程, 2009,17(1): 196-201

ZHANG Lei, DING Ya-lin, JIANG Gui-de, ZHANG Shu-qing, XU Yong-sen. Optimization of slit width on shutter for aerial camera[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 196-201
张雷, 丁亚林, 蒋贵德, 张树青, 许永森. 航摄快门帘缝宽度的优化[J]. 光学精密工程, 2009,17(1): 196-201 DOI：

ZHANG Lei, DING Ya-lin, JIANG Gui-de, ZHANG Shu-qing, XU Yong-sen. Optimization of slit width on shutter for aerial camera[J]. Editorial Office of Optics and Precision Engineering, 2009,17(1): 196-201 DOI：

摘要

介绍了航空侦察相机帘幕式快门的工作原理

分析了胶片感光特性曲线与分辨率的关系。从胶片感光特性曲线确定了使胶片获得高分辨率的最佳曝光量

并由感光材料的性能参数推导出最佳曝光量的表达式。最后

由快门有效曝光时间的表达式计算出能够获得最佳曝光量的快门帘缝宽度的表达式。对EK3412胶片进行了测绘

显影速度分别为10、15、20和25 frames/min时的最佳曝光量分别为0.073、0.098、0.116和0.136 lxs。飞行实验验证

所获得的照片分辨率可以提高10％~20％

接近理论分辨率130 lpm。将曝光量控制在感光特性曲线直线段的中点

可以显著提高照片的分辨率

满足图像判读要求。

Abstract

The working principle of curtain type shutter in an aerial camera is introduced and the relationship between sensitive characteristics and resolution for a film is analyzed. Then

expression of the best exposure is deduced by the parameters of photosensitive material. Finally

expression of the slit width is worked out by calculated expression of the exposure time. According to mapping EK3412

the best exposure is 0.073

0.098

0.116 and 0.136 lxs

when the image speed is 10

20 and 25 frames/s. After flying experimental verification

the resolution of the film can be increased by 10%~20%

which is closed to the theoretical resolution of 130 lpm. By controlling exposure amount to the mid-point on straight line of the characteristic curve

the resolution of photo be can significantly improved to meet the requirements of image interpretation.

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Keywords

references

李威,李朝晖,颜昌翔. 胶片型航空相机的快门设计和研究[J]. 光学精密工程,2005,13(增):9-14. LI W,LI ZH H,YAN CH X. Design and study on the shutter in a films-pace camera . Opt. Presicion. Eng.2005,13(supp.):9-14. (in Chinese)[2] 修吉宏,翟林培. 影响航空图像质量的主要因素分析 . 红外,2005(8):10-15. XIU J H,ZHAI L P.Main factors affecting of the quality of aerial images[J].Infrared,2005(8):10-15.(in chinese)[3] 李威.一种航空/航天摄影相机快门的结构设计及其精度分析 . 北京:中国科学院研究生院,2001. LI W.Structrul design and presicion analysed on shutter in a aerial/space camera .Beijing:Graduate School of the Chinese Acadamy of Sciences,2001.(in chinese)[4] 金养智,魏杰,刁振刚,等.信息记录材料[M]. 北京:化学工业出版社,2003. JIN Y ZH,WEI J,DIAO ZH G,et al..Materal for Recording Information[M].Beijing:Chemical Industry Press,2003.(in chinese)[5] 麦克金尼R G.感光材料和摄影处理[M]. 北京:测绘出版社,1984. MCKINNEY R G.Senitive Material and Resoving Image[M].Beijing:Surmap Press,1984. (in chinese)[6] 蔡俊良. 航空胶片感光度及其应用[J]. 感光材料,1990(6):29-34. CAI J L.Sensitizition speed and application on aerial-film[J].Photo Sensitive Material, 1990(6):29-34.(in Chinese)[7] 朱瑞林. 黑白航空胶片感光度和平均标度测量尺[J]. 感光材料,1991(2): 43-44. ZHU R L.Sensitive speed and average scale of black-and-white aerial camera films[J].Photo Sensitive Material, 1991(2): 43-44.(in Chinese)[8] 何艳玲. 黑白航空摄影胶片ISO航空感光度和平均斜率的测定方法[J]. 影像技术,2001(2):35-36. HE Y L. Determination of ISO aerial speed and average gradient of black-and-white aerial camera films[J].Image Technology, 2001(2):35-36.(in Chinese)[9] ZYZNOWSKIA M,DEBSKI W,KLEWSKI B A,et al..Polands experience in acquiring remote sensing data with in the open skies onternational treaty . Geo-Imagery Bridging Continents XXth ESPRS Congress,Istanbul,Turkey,2004:79.[10] 贾永红. 基于计算机解算感光材料特性数值方法的比较[J]. 武测科技,1994(4):34-37. JIA Y H. The comparison of mathematical method based on computer[J]. Wu Measure Technology, 1994(4):34-37.(in Chinese)

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