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year 28, Issue 2 (ICOP & ICPET 2022 2022)                   ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 500-503 | Back to browse issues page

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mohammad.hendijanifard M. Process Photoluminescence Microscope Built to Recognize Dead LEDs. ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :500-503
URL: http://opsi.ir/article-1-2779-en.html
Abstract:   (465 Views)
 
A photoluminescence microscope is built using continuous wave 405 nm excitation lasers.
The photoluminescence objects for this work are green light emitting diodes (LEDs). The emission of these LEDs occurs at 525 nm. If the LEDs are not shorted, they photoluminesce at 525 nm. Therefore, the dead LEDs look dark under photoluminescence microscope. Photoluminescence microscope can identify dead LEDs before even connecting them to the electric source. The use of such a microscope is within the process of manufacturing LEDs.
 
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Type of Study: Experimental | Subject: Special

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