Request InfoSwissOptic AGSwissOptic AG offers three neutral density filters that can be produced either as analog types with a continuous gradient, or digitally, with a discrete gradient. In linear gradient filters, the optical density shifts and is defined along an axis, so the density gradient can be defined in terms of linear or logarithmic functions or as a Gaussian profile. Because the optical density of the company's circular filters changes in a circular pattern as a function of angle, the density gradient can be defined by various mathematical functions. The optical gradient of its radial filters changes from...See full productRelated content from Photonics MediaPRODUCTSPhotonics Spectra October 2023 IssueCoated Glass FiltersNVIS Coated Glass Filters from Abrisa Technologies are designed for night vision imaging systems and lighting displays. 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Also known as a gray filter.Fiber Optic FiltersLiquid FiltersA liquid filter is a solution or combination of solutions that serves as a filter.Diffusing Screens for Light Sources and LensesA diffusing-- for light sources and lenses screen is a diffusing screen is a transparent filter that reduces the light (or some wavelengths of the light) passing through it.COMPANIESPhotonics Buyers' GuideReynard CorporationReynard Corporation has been a premier supplier of custom optics and thin-film coatings to a global customer base since 1984. 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