Andover UV Filters

UV optical filters are designed to control ultraviolet light within specific wavelength ranges, typically from 193 nm to 380 nm. They’re used to isolate, attenuate, or redirect UV radiation in systems such as semiconductor lithography, analytical instrumentation, pollution monitoring, and UV laser setups.

Andover manufactures several UV filter types to match different performance requirements:

• Standard resistance-coated UV filters for precise deep-UV spectral selection.

• UV cold mirrors and dielectric filters for high transmission from 260 nm upward.

• First-surface UV filters for systems requiring direct optical access or custom geometries.

• UV neutral density (ND) filters for controlled attenuation without altering the spectral profile.

First-surface UV filters have coatings applied directly to the incident surface, allowing for custom shapes and integration into systems where the filter must interact directly with the optical path. They provide mechanical flexibility but slightly lower transmission than dielectric-coated optics.

UV ND filters attenuate light evenly across the spectrum, maintaining spectral neutrality. They’re ideal for UV laser systems, imaging setups, and calibration equipment where consistent power reduction is needed without wavelength distortion.

Yes. Andover specializes in custom UV optical filters with user-defined wavelength ranges, bandwidths, optical densities, shapes, and sizes. Our vertically integrated process—from substrate fabrication to coating—ensures precision and repeatability for specialized applications.