• CN: 11-2187/TH
  • ISSN: 0577-6686

›› 2004, Vol. 40 ›› Issue (4): 127-130.

• Article • Previous Articles     Next Articles

STUDY ON CORRECTION OF NON-LINEARITY TO TWO-DIMENSION POSITION SENSITIVE DETECTOR FOR LASER ALIGNMENT MEASUREMENT

Chen Changzheng;Mo Changtao   

  1. Diagnosis and Control Center, Shenyang University of Technology School of Science, Northeastern University
  • Published:2004-04-15

Abstract: The principle of position sensitive detector(PSD) is briefly introduced. The causes of non-1inearity of PSD are analyzed. Through defining network average error as objective function, weights and thresholds as design variable, network parameters are computed quickly by gradient and conjugate gradient optimizations. Conjugate gradient optimum algorithm for neural network to correct the non-linearity of PSD after pre-calibration are provided.This method is applied to linearity of PSD. The correction leads to prominent improvement of linearity of B-area,and the usable area of PSD is thus extended.The reliability of data is also improved without increasing the complexity of hardware.

Key words: Conjugate gradient optimum algorithm, Correction of non-1inearity, Neural network, Position sensitive detector

CLC Number: