کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1536475 | 996568 | 2012 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Photorefractive Fourier transform profilometer for the measurement of 3-D object shapes Photorefractive Fourier transform profilometer for the measurement of 3-D object shapes](/preview/png/1536475.png)
In the present work dynamic moiré-like fringe patterns, produced by photorefraction with low spatial frequencies, applied for profile determination of small objects is proposed. Basically, a Fourier transform profilometry technique is developed for an automated profile determination. This means, as far as we know, a new experimental procedure that exploits the real time holographic two wave mixing in Bi12TiO20 crystal sample. Besides, the mainly advantages of this procedure are, comparatively to the classical fringe projection method using the Michelson interferometer, best fringe pattern contrast, less speckle noise, absence of noises produced by spurious reflections and, the most significant, a pure sinusoidal shape obtained by dynamic holographic moiré-like process using photorefraction.
Journal: Optics Communications - Volume 285, Issue 24, 1 November 2012, Pages 4906–4910