A Novel Optical Method of Dimension Measurement of Objects with Circular Cross-section

Author

Tomas Radil;Jan Fischer;Jan Kucera

Author_Institution

Czech Technical University in Prague, Faculty of Electrical Engineering, Department of Measurement, Technicka 2, 166 27 Prague, Czech Republic. Phone: +420-224 352 187, Fax: +420-233 339 929, E-mail: tomas.radil@volny.cz

fYear

2006

fDate

4/1/2006 12:00:00 AM

Firstpage

386

Lastpage

391

Abstract

Common optical methods for dimension measurement apply an imaging sensor with lens. The presence of the lens in the camera (and sometimes also in the employed illuminator) increases the total dimensions of the measuring set-up. The aberrations of the lens represent a source of uncertainty. In order to simplify the measuring set-up and to reduce its overall dimensions, the proposed method applies a measuring set-up that contains no lens (it employs an imaging sensor without lens and two point light source). In this paper, the application of this method for dimension measurement of objects with circular cross-section is described. Also, several issues related to its implementation are discussed and its performance is illustrated using experimental results

Keywords

"Optical sensors","Light sources","Lenses","Optical imaging","Image sensors","Electric variables measurement","Shape measurement","Optical collimators","Structural beams","Geometrical optics"

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2006. IMTC 2006. Proceedings of the IEEE

ISSN

1091-5281

Print_ISBN

0-7803-9359-7

Type

conf

DOI

10.1109/IMTC.2006.328478

Filename

4124350