Jun. 2020

Article Contents

Chinese Optics> 2020> 13(3): 616-626.

YU Chun-feng, CHEN Zhi-chao, JIA Ping, WANG Nai-xiang, HOU Han. Analysis of the effect of lens shutter on image motion in aerial camera[J]. Chinese Optics, 2020, 13(3): 616-626. doi: 10.3788/CO.2019-0127

Citation:

YU Chun-feng, CHEN Zhi-chao, JIA Ping, WANG Nai-xiang, HOU Han. Analysis of the effect of lens shutter on image motion in aerial camera[J].Chinese Optics, 2020, 13(3): 616-626.doi:10.3788/CO.2019-0127

Citation:

YU Chun-feng, CHEN Zhi-chao, JIA Ping, WANG Nai-xiang, HOU Han. Analysis of the effect of lens shutter on image motion in aerial camera[J].Chinese Optics, 2020, 13(3): 616-626.doi:10.3788/CO.2019-0127

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Analysis of the effect of lens shutter on image motion in aerial camera

doi:10.3788/CO.2019-0127

YU Chun-feng^{1, 2,,},
CHEN Zhi-chao^{1, 2,},
JIA Ping^{1, 2,},
WANG Nai-xiang^{1, 2},
HOU Han^{1, 2}

1.
Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
2.
Key Laboratory of Airborne Optical Imaging and Measurement, Chinese Academy of Sciences, Changchun 130033, China

Funds:Supported by National Key R&D Program Funding Projects（No. 2016YFC0803000）

More Information

Author Bio:
YU Chun-feng (1979—), was born in Changchun, Jilin province. In 2013, he graduated from University of Chinese Academy of Sciences. Now he is working as an associate professor at Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. His research interests are aerial imaging and measurement technology. E-mail:hou791016@163.com
CHEN Zhi-chao (1979-), was born in Tieling, Liaoning province, Doctor, associate professor, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. In 2016,graduated from University of Chinese Academy of Sciences, He research interests are automatic focusing technology of aerial camera. E-mail:17522332@qq.com
JIA Ping (1964-), Doctor, professor, Ph.D.supervisor, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences. He research interests are aerial imaging and measuring instrument technology. E-mail:jiap@ciomp,ac,cn
Corresponding author:hou791016@163.com
Received Date:18 Jun 2019
Rev Recd Date:28 Jun 2019
Publish Date:01 Jun 2020

Abstract

Abstract

In order to improve the photographic resolution of aerial remote sensing cameras and obtain high-resolution aerial images, besides optical system with high modulation transfer function and high-quality imaging medium, the exposure time of shutter should be controlled correctly to ensure that the detector can obtain an appropriate image motion value. Based on the structure and working principle of the lens shutter of an aerial mapping camera, we establish the matrix relationship between the ground object and the image through coordinate transformation method, that is, the relationship between the exposure time of the shutter and the image motion value is determined. The image motion value and residual error of the image motion are analyzed by combining the parameters of the camera speed-height ratio and the pixel size. According to the different installation modes of the aerial camera, when the residual error of the image motion value is more than 1/3 of a pixel in size, the Image Motion Compensation (IMC) mechanism is necessary to the imaging system. Thus a theoretical basis for the design of the IMC mechanism in an aerial camera is provided. The analysis is validated by a static test and flight test. The test results show that the aerial camera clearly captures images and the spatial resolution of its images reaches 36.8 lp/mm, which meets the requirements of our technical index.
- lens shutter,
- image motion,
- exposure time,
- residual error of image motion,
- Image Motion Compensation (IMC)

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References (13)

References

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