Optical Filters are used to selectively transmit or reject a wavelength or range of wavelengths. Optical Filters are used in applications such as fluorescence microscopy, spectroscopy, clinical chemistry, or machine vision inspection. Optical Filters are ideal for life science, imaging, industrial, or defense industries. AOS Optics offers a variety of Optical Filters for many applications, including bandpass interference, notch, edge, dichroic, color substrate, or ND. AOS Optics also offers highly durable hard coatings for applications that require high optical densities with maximum performance.