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	Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE)
	Li Z. ; Wang X. ; Li W. ; Kuang H. ; Han C.
	2005
会议名称	ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005
会议地点	Changchun, China
关键词	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.
收录类别	EI
内容类型	会议论文
源URL	[http://ir.ciomp.ac.cn/handle/181722/33615]
专题	长春光学精密机械与物理研究所_中科院长春光机所知识产出_会议论文
推荐引用方式 GB/T 7714	Li Z.,Wang X.,Li W.,et al. Self Imaging technique for refocusing an aerospace camera (EI CONFERENCE)[C]. 见:ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005. Changchun, China.

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