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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 488-491 |
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Mashayekhi Asl A, yeganeh M, Salimian S, Noferesti A. Introduction to a New Method to Determination of Laser Induced Damage Threshold. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :488-491
URL: http://opsi.ir/article-1-2594-en.html
URL: http://opsi.ir/article-1-2594-en.html
Abstract: (341 Views)
The laser induced damage threshold is a very important parameter in determining the resistance of an optical element to laser radiation. The usual methods used according to the ISO 21254 (1-4) standard to determine the moment of failure of the element, are indirect methods, which sometimes have complexities that are costly to use. In addition, these methods need to be validated by other methods, including microscopic representation of the formed damage. This paper introduces a new method for identifying the laser damage threshold of various optical filters, in addition to the methods in the ISO international standard. This method is based on the use of far-field diffraction patterns of probe laser from the area subject to destruction and image processing of it. The most important advantage of this method is simplicity, cheapness and no need for a spatial filter for laser. In this paper, we show that very small damage at the beginning of formation with a size of about 75 microns can be detected.
Keywords: image processing, laser induced damage threshold, laser instruments, LIDT, quality control.
Type of Study: Experimental |
Subject:
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