Conjugate gradient optimum algorithm study of non-linear correction for one-dimension PSD

Changtao Mo; Xin Du; Li-li Zhang; Ming Wang

doi:10.1117/12.828616

20 May 2009 Conjugate gradient optimum algorithm study of non-linear correction for one-dimension PSD

Changtao Mo, Xin Du, Li-li Zhang, Ming Wang

Proceedings Volume 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 72830S (2009) https://doi.org/10.1117/12.828616
Event: AOMATT 2008 - 4th International Symposium on Advanced Optical Manufacturing, 2008, Chengdu, Chengdu, China

Abstract

The position sensitive detector (PSD) is a kind of photo-electronic sensor which can detect the position of a light spot incident on its surface. Many types of non-contact dynamic displacement monitoring instruments could be constructed using PSD. How to overcome the influence of non-linearity action is the most important problem to improve measuring precision and reliability of the instrument. The causes of non-1inearity of PSD are analyzed in this paper. Conjugate gradient optimum algorithm for nerve network to correct the non-linearity of PSD is provided according to whose characteristic, so that the linearity of non-linear area is approximate identical to linear area's .The correction leads to prominent improvement of measurement precision for non-linear area, and the usable area of PSD is thus extended. The data reliability is also improved without increasing the complexity of hardware.

Citation Download Citation

Changtao Mo, Xin Du, Li-li Zhang, and Ming Wang "Conjugate gradient optimum algorithm study of non-linear correction for one-dimension PSD", Proc. SPIE 7283, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 72830S (20 May 2009); https://doi.org/10.1117/12.828616

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