Title of article
On-line surveillance of a dynamic process by a moving system based on pulsed digital holographic interferometry
Author/Authors
Osten، Wolfgang نويسنده , , Pedrini، Giancarlo نويسنده , , Alexeenko، Igor نويسنده , , Schnars، Ulf نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2006
Pages
-934
From page
935
To page
0
Abstract
A method based on pulsed digital holographic interferometry for the measurement of dynamic deformations of a surface by using a moving system is presented. The measuring system may move with a speed of several meters per minute and can measure deformation of the surface with an accuracy of better than 50 nm. The deformation is obtained by comparison of the wavefronts recorded at different times with different laser pulses produced by a Nd:YAG laser. The effect due to the movement of the measuring system is compensated for by digital processing of the different holograms. The system is well suited for on-line surveillance of a dynamic process such as laser welding and friction stir welding. Experimental results are presented, and the advantages of the method are discussed.
Keywords
CCD , detectors , charge-coupled device , instrumentation , Measurement , Metrology , Optical design of instruments , Optical design , Fabrication , Optical systems design , Ultrafast optics , Ultrafast measurements , Atmospheric , ocean optics , Wave-front sensing
Journal title
Applied Optics
Serial Year
2006
Journal title
Applied Optics
Record number
75425
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