QQ客服 官方微博 反馈留言

	Calibration error of Hartmann wavefront sensor caused by nonuniform intensity distribution
	Jian Huang; Hao Xian
	2010
会议名称	Proceedings of the SPIE - The International Society for Optical Engineering
会议日期	2010
卷号	7656
页码	765675 (6 pp.)
通讯作者	Jian Huang
中文摘要	The principle of Hartmann wavefront sensor is that the centroid angle deviation of spot equals to the mean slope of the phase on the subaperture, but its precisionis up to one of two assumptions: the beam is divided into plan wave and the beam intensity distribution is uniform on each subaperture. When none of these two assumptions is satisfied in the wavefront detection, the centroid angle deviation of far field spot is not exactly equals to the mean slope of the phase on each subaperture, and finally the wavefront detecting error is produced. A similar case occurs when calibrating the Hartmann wavefront sensor. The translation error of microlens arrays and the focal length differences of microlens arrays would introduce defocuses on all subapertures, the centroid of the far-field spot is not the same as the mean slope of the phase of calibrating beam when the calibrating beam has nonuniform intensity distribution, as a result, the calibration error of Hartmann wavefront sensor comes out. Two formulas, which evaluate the calibration error associated with the nonumiform intensity distribution and the defocus of microlens arrays are obtained in this paper, these formulas provide theoretical supports to design and calibrate a Hartman Sensor required millesimal wavelength precision. Also a new parameter is derived to characterize the nonuniformity of the intensity distribution.
英文摘要	The principle of Hartmann wavefront sensor is that the centroid angle deviation of spot equals to the mean slope of the phase on the subaperture, but its precisionis up to one of two assumptions: the beam is divided into plan wave and the beam intensity distribution is uniform on each subaperture. When none of these two assumptions is satisfied in the wavefront detection, the centroid angle deviation of far field spot is not exactly equals to the mean slope of the phase on each subaperture, and finally the wavefront detecting error is produced. A similar case occurs when calibrating the Hartmann wavefront sensor. The translation error of microlens arrays and the focal length differences of microlens arrays would introduce defocuses on all subapertures, the centroid of the far-field spot is not the same as the mean slope of the phase of calibrating beam when the calibrating beam has nonuniform intensity distribution, as a result, the calibration error of Hartmann wavefront sensor comes out. Two formulas, which evaluate the calibration error associated with the nonumiform intensity distribution and the defocus of microlens arrays are obtained in this paper, these formulas provide theoretical supports to design and calibrate a Hartman Sensor required millesimal wavelength precision. Also a new parameter is derived to characterize the nonuniformity of the intensity distribution.
收录类别	EI ; ISTP
语种	英语
内容类型	会议论文
源URL	[http://ir.ioe.ac.cn/handle/181551/7741]
专题	光电技术研究所_自适应光学技术研究室（八室）
作者单位	中国科学院光电技术研究所
推荐引用方式 GB/T 7714	Jian Huang,Hao Xian. Calibration error of Hartmann wavefront sensor caused by nonuniform intensity distribution[C]. 见:Proceedings of the SPIE - The International Society for Optical Engineering. 2010.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。