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Long Pass or Short Pass Filters?

Long pass filters allow longer wavelengths of light to pass through while blocking shorter wavelengths, making them suitable for applications like blocking UV light while allowing visible and IR light. Short pass filters, on the other hand, allow shorter wavelengths to pass while blocking longer wavelengths, often used to remove IR light while allowing visible light to pass. The choice between them depends on the specific optical system needs and desired wavelengths of light.