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Rectangular Continuously Variable Neutral Density Filters (ND Filters) are a special kind of neutral density filter, unlike a homogeneous neutral density filter that offers even attenuation across the surface of the filter, the optical densities of a rectangular continuously variable ND filter change linearly across the longest dimension (which is the length) of the filter, allowing precise control over the attenuation through transition within the coated region.

North Optics's Rectangular Continuously Variable Neutral Density Filters are precision-engineered to provide precise control over light attenuation for various optical applications. These filters are crafted with meticulous care using two superior substrate materials: BK7 or Fused Silica. Four maximum optical densities including OD1, OD2, OD3, and OD4 are available, offering exceptional versatile functions in managing light transmission according to your specific needs.

Covering a broad transmission wavelength range of 380-2000nm for BK7 and an extended range of 250-2500nm for Fused Silica, these filters accommodate different spectra in UV, VIS, and IR. This expansive wavelength coverage ensures suitability across various optical experiments and applications.

For your convenience, North Optics offers two options: stock Rectangular Continuously Variable Neutral Density Filters for expedited delivery or custom Rectangular Continuously Variable Neutral Density Filters tailored to meet your requirements. This flexibility ensures seamless integration into your projects while maintaining the highest standards of performance and precision.

Elevate your optical experiments and applications with our Rectangular Continuously Variable Neutral Density Filters. Whether you need rapid ordering or tailored solutions, these filters from North Optics are primed to deliver exceptional light control and precision.