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Volume 20 -                   ICOP & ICPET _ INPC _ ICOFS 2014, 20 - : 365-368 | Back to browse issues page

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Partovi Shabestari N, Ahmadalidokht I, Ghaemi bafghi H, Ruzbehani M, Madjidi zolbin H. Design and fabrication of a stabilizing holographic fringe system by feedback control based on CCTV camera. ICOP & ICPET _ INPC _ ICOFS 2014; 20 :365-368
URL: http://opsi.ir/article-1-180-en.html
Design and fabrication of a stabilizing holographic fringe system by feedback control based on CCTV camera
Naser Partovi Shabestari *1 , Isa Ahmadalidokht1 , Hamid Ghaemi bafghi2 , Mohsen Ruzbehani1 , Habib Madjidi zolbin2
1- Laser & Optics Research School
2- Department of Physics, Iran University of Science and Technology,
Abstract:   (5653 Views)

In this paper, stabilizing holographic interference fringe in recording step is put forward. Kernel of this method is production of negative feedback based on CCTV camera which is used to compensate random displacement of fringe interference caused by external vibration in long recording time. The proportion-integral-derivative (PID) method is used to control piezoelectric mirror, compensate fringe displacement and freeze holographic interference fringe. Using this system cause displacement of interference fringe error become under λ/24 (at recording wavelength of 442nm) and the quality of the holographic grating can be greatly improved.

Keywords: holographic interference fringe, CCD, Piezoelectric, holographic grating, holographic lithography
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Type of Study: Research | Subject: Special
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