Accuracy of position detection using a position-sensitive detector

被引：30

作者：

Schaefer, P ^{[1
]}

Williams, RD ^{[1
]}

Davis, GK ^{[1
]}

Ross, RA ^{[1
]}

机构：

[1] Univ Virginia, Charlottesville, VA 22903 USA

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1998年 / 47卷 / 04期

关键词：

detectors; optical position measurement; photodetectors; photodiodes; position measurement;

D O I：

10.1109/19.744642

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Position-sensitive detectors (PSD) provide four current outputs that are proportional to the two-dimensional center of mass of a light spot impinging on the face of the detector. This characteristic permits the PSD to be used for sensing the position of a light source. The application motivating the work reported here involved the tracking of a light source located on a surface with approximate dimensions 122 cm wide by 91 cm high located approximately 2 m from the detector. The diameter of the light source was a few millimeters. The work described here demonstrates the feasibility of using a PSD to track the position of a light source with accuracy better than 1 mm from this distance.

引用

页码：914 / 919

页数：6

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