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Imaging and detection method for low signal-to-noise ratio airborne synthetic aperture ladar signals 期刊论文
Optical Engineering, 2023, 卷号: 62, 期号: 9
作者:  J. Gao;  D. Li;  K. Zhou;  A. Cui;  J. Wu
收藏  |  浏览/下载：2/0  |  提交时间：2024/07/03
Maintenance method of signal coherence in lidar and experimental validation 期刊论文
Optics Letters, 2022, 卷号: 47, 期号: 20, 页码: 5356-5359
作者:  J. H. Gao;  D. J. Li;  K. Zhou;  A. J. Cui;  J. Wu and Y. Yao
收藏  |  浏览/下载：0/0  |  提交时间：2023/06/14
Fast auto-focusing search algorithm for a high-speed and high-resolution camera based on the image histogram feature function 期刊论文
Applied Optics, 2018, 卷号: 57, 期号: 34, 页码: F44-F49
作者:  Guo, C. Z.;  Ma, Z. L.;  Guo, X.;  Li, W. X.;  Qi, X. D.
收藏  |  浏览/下载：10/0  |  提交时间：2019/09/17
Improvement in focusing accuracy of DNA sequencing microscope with multi-position laser differential confocal autofocus method 期刊论文
Optics Express, 2018, 卷号: 26, 期号: 2, 页码: 895-904
作者:  Zhang, X.;  Zeng, F.;  Li, Y.;  Qiao, Y. F.
收藏  |  浏览/下载：7/0  |  提交时间：2019/09/17
Analysis of image motion on autofocus precision for aerial cameras 期刊论文
Optical Engineering, 2015, 卷号: 54, 期号: 8, 页码: 9
作者:  Meng, F. H.;  Y. L. Ding;  D. J. Wang and J. H. Xiu
收藏  |  浏览/下载：12/0  |  提交时间：2016/07/15
Autofocus method for scanning remote sensing cameras 期刊论文
Applied Optics, 2015, 卷号: 54, 期号: 20, 页码: 6351-6359
作者:  Lv, H.;  C. S. Han;  X. C. Xue;  C. H. Hu and C. Yao
收藏  |  浏览/下载：9/0  |  提交时间：2016/07/15
相位法检焦技术在经纬仪中应用的研究 学位论文
博士, 长春光学精密机械与物理所: 中国科学院长春光学精密机械与物理所, 2007
梁翠萍
收藏  |  浏览/下载：8/0  |  提交时间：2012/03/21
Autofocus system for space cameras 期刊论文
Optical Engineering, 2005, 卷号: 44, 期号: 5
Li Z. H.; Wu K. Y.
收藏  |  浏览/下载：4/0  |  提交时间：2012/10/21
Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE) 会议论文
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
Li Z.; Wang X.; Li W.; Kuang H.; Han C.
收藏  |  浏览/下载：28/0  |  提交时间：2013/03/25
A novel auto-focusing technique using a self imaging approach is developed for an aerospace camera having large aperture and long focus. Its optical system consists of an emitting system  receiving system  and two penta-prisms. Emitting system has three parts: a light source  beamsplitter  and aim slit. The receiving system includes a field lens  two separate lenses  and CCD. Using two little penta-prisms instead of a large planar mirror makes the autofocus system simple and compact. CCD was used as photoelectric converting device. A defocused signal is acquired by measuring the change of the two slit self-images position imaged on the CCD. A simple and compact construction of the auto-focusing system was proposed. The algorithm to calculate the moving of the slit-self images position was analyzed in order to achieve subpixel position estimation. The results of the experiments show a 10m focusing precision. The system demonstrates high resolution  easy adjustment and high reliability.  

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