Laser spot center location by using the gradient-based and least square algorithms

Author

Lei Xin ; Lijun Xu ; Zhang Cao

Author_Institution

Sch. o f Instrum. & Opto-Electron. Eng., Beihang Univ., Beijing, China

fYear

2013

fDate

6-9 May 2013

Firstpage

1242

Lastpage

1245

Abstract

A new method for laser spot center location by using the gradient-based and the least square algorithms is introduced in this paper. Compared with the traditional gravity-based algorithm, the results obtained by the proposed method are of higher accuracy. In the experiments, the dimension of the image detected by the CCD is 1024×768. The relative errors of the results were calculated in order to validate the method proposed in this paper. Comparisons of the results were made between the proposed method and the gravity-based algorithm. Results show that the proposed method is of higher accuracy for the center location and the accuracy can be improved by increasing the number of the selected points in the least square algorithm.

Keywords

gradient methods; least mean squares methods; measurement by laser beam; measurement systems; CCD; gradient-based algorithms; gravity-based algorithm; laser spot center location; least square algorithms; measurement systems; relative errors; Accuracy; Algorithm design and analysis; Charge coupled devices; Laser applications; Measurement by laser beam; Vectors; center location; gradient-based algorithm; laser spot; least square algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC), 2013 IEEE International

Conference_Location

Minneapolis, MN

ISSN

1091-5281

Print_ISBN

978-1-4673-4621-4

Type

conf

DOI

10.1109/I2MTC.2013.6555612

Filename

6555612