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Proceedings Paper

PSD-based angle-detecting principle for ESG
Author(s): Weifeng Tian; Junpu Wang; Zhihua Jin
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Paper Abstract

This paper presents the angle detecting principle based on Position Sensitive Detector (PSD). Two approaches are compared, which are plane-reflection and image-reflection. The calculations executed show the former scheme requires lens with longer focal distance, and that the sensor will have bigger size. Because of miniaturization of sensors for ESG theoretical work is mainly done on the latter approach in this paper. After analyzing the angle detecting principle, the mathematical model is derived and steps to calculate displacement of ESG 's momentum are presented. Since the model is a non-linear and implicit function, it is simplified to be easy to realize in engineering application. Based on the simplified model, it is shown that the direct component in the output of PSD is proportional to the polar axis displacement of ESG in a certain range. The result verifies possibility to use PSD as the angle detecting sensor of ESG.

Paper Details

Date Published: 9 September 2002
PDF: 6 pages
Proc. SPIE 4920, Advanced Sensor Systems and Applications, (9 September 2002); doi: 10.1117/12.482017
Show Author Affiliations
Weifeng Tian, Shanghai Jiaotong Univ. (China)
Junpu Wang, Shanghai Jiaotong Univ. (China)
Zhihua Jin, Shanghai Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 4920:
Advanced Sensor Systems and Applications
Yun-Jiang Rao; Julian D. C. Jones; Hiroshi Naruse; Robert I. Chen, Editor(s)

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