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Temperature-stable LED-based light source without temperature control
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DOI：10.1117/12.2211576.png)
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Abstract
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Many medical, environmental, and industrial sensing applications could take advantage of uncooled temperature-stable optical sources that are incoherent and un-polarized as such sources do not produce interference fringes, speckle patterns, or intensity variations due to polarization. For this purpose we propose an optical system for stabilization of light-emitting diodes over temperature exhibiting output power variation below 50 ppm/degrees C which does not employ any kind of TEC elements or even thermometers. This makes it especially suitable for handheld and battery operated instruments.
Keywords:
LED sources
temperature stability
temperature control
polarization
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