Where to Buy Neutral Density Filters

EMF, a Dynasil company, maintains large inventory reflective ND filters in optical densities of 0.3, 0.5, 0.6, 0.9, 1.0, 1.3, 1.5, 2.0, 2.5 and 3.0. Custom optical densities can be achieved by stacking several ND filters together. The total density being equal to the sum of the density of each filter in the stack.

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Shalom EO offers both reflective and absorbing type neutral density filters for use in a wide wavelength range. Our reflective type filter product series consist of UV ND filters (250-380 nm), VIS ND filters(400-700 nm), VIS-NIR ND filters (400-1100 nm), circular variable ND filters, rectangular continuously variable ND filters, and germanium substrate IR reflection ND filters. Substrate materials include UV fused silica, BK7 and germanium. As for filters of absorbing type, we offer colored glass absorbing filters.

Edmund Optics offers a wide variety of neutral density filters for ultraviolet (UV), visible and infrared applications. Neutral density filter kits are available, which include a number of filters in a range of optical densities. Stepped ND filters are also available, which offer a number of optical densities on a single filter, ideal for lab or R&D integration.

EKSMA Optics has standard neutral density (ND) reflective (at 400–2000 nm) and absorption type (at 450–650 nm) filters.

VisiMax process neutral density (ND) filters produce a constant attenuation across a range of visible wavelengths, and are used to reduce the intensity of light by reflecting a portion of it. VisiMax ND filters transmit only a specified percentage of light equally across a range of wavelengths, enabling important performance features in a range of optical systems.