A Short-Wave Infrared (SWIR) lens is essential before using a beam splitter prism in optical systems because it ensures the efficient capture and focusing of SWIR light, which is crucial for accurate imaging and data analysis. SWIR lenses are specifically designed to transmit and focus light in the SWIR wavelength range (0.9 to 1.7 microns), which cannot be effectively captured by standard visible light lenses.
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