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Microscopy Bandpass Filters are used to selectively transmit a small portion of wavelengths while rejecting all others for laser applications such as line separation, microscopy, or spectroscopy. Bandpass Filters use a variety of substrates, coatings, or a combination of the two to isolate a specific range of wavelengths for transmission. Bandpass Filters are available in a wide range of wavelengths suitable for many laser application needs.