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	Study on mathematical modeling for optical pickup virtual analyzer - art. no. 68340N
	Cheng, Xuemin ; Ma, Jianshe ; Yan, Shuang
	2010-05-10 ; 2010-05-10
会议名称	OPTICAL DESIGN AND TESTING III, PTS 1 AND 2 ; Conference on Optical Design and Testing III ; Beijing, PEOPLES R CHINA ; Web of Science
关键词	mathematical model optical pickup tolerance Optics
中文摘要	Optical pick-up is an optical apparatus to record and/or reproduce information from an optical disc. It is a kind of large aperture optical system of diffraction limited. As a product of mass production, its accuracy is guaranteed by reasonable balance among fabricating and assembling tolerances of optical, mechanical and optoelectronic elements. One method employed is conduct sensitivity analyses to identify tolerances for each element, which usually limits the manufacturability and cost of optical pickup. In this paper, the method of optical pickup virtual analyzer is proposed to improve the manufacturability. The mathematical modeling used for virtual analyzer is established based on the system image quality and laser spot characteristics on photo detector. First, a three-dimensional virtual optical pickup model is established, in which the characteristics and fabricating and assembling errors of each optical element (beam splitter, mirror, collimator and objective), optoelectronic element (laser diode and photo diode)and mechanical support element are described. The optical disk is represented as a reflective surface. The photo diode integrated circuit could work virtually so that it could receive the laser spot reflected from the optical disk. The photosensitive division on it would differentiate the laser spot on it and give the signals according to requirements of the real analyzer. The virtual analyzer can help combine suitable elements of looser tolerance for optical pickup assembling and improve the manufacturability efficiently. The mathematical model is developed using the Macro-PLUS language and a CD/DVD optical pickup virtual analyzer is successfully optimized with the model.
会议录出版者	SPIE-INT SOC OPTICAL ENGINEERING ; BELLINGHAM ; 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98227-0010 USA
语种	英语 ; 英语
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/19997]
专题	清华大学
推荐引用方式 GB/T 7714	Cheng, Xuemin,Ma, Jianshe,Yan, Shuang. Study on mathematical modeling for optical pickup virtual analyzer - art. no. 68340N[C]. 见:OPTICAL DESIGN AND TESTING III, PTS 1 AND 2, Conference on Optical Design and Testing III, Beijing, PEOPLES R CHINA, Web of Science.

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