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Circular Variable Neutral Density Filters

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Specifications:

Substrate Materials BK7, Fused Silica Out Diameter 20mm to 200mm
Inner Diameter 7.5mm, 8.0mm and 8.3mm Out Diameter Tolerance +0.0/-0.15mm
Inner Diameter Tolerance +0.15/-0.0mm Thickness Tolerance +/-0.1mm
Parallelism 3’ Linearity +/-5%
Error of Maximum OD +/-5% Surface Quality 80/50 S/D
Coating Area 0 ~ 270° Design Wavelength Range

380nm to 2000nm (BK7)

250nm to 2500nm (Fused Silica)

Modules or Types:

Code Out Diameter Inner Diameter OK Substrate
444-001 100 7.5 1 BK7
444-002 100 7.5 2 BK7
444-003 100 7.5 3 BK7
444-004 100 7.5 4 BK7
444-005 50 8.0 1 BK7
444-006 50 8.0 2 BK7
444-007 50 8.0 3 BK7
444-008 50 8.0 4 BK7
444-009 25 8.3 1 BK7
444-010 25 8.3 2 BK7
444-011 25 8.3 3 BK7
444-012 25 8.3 4 BK7
444-013 60 8.3 1 BK7
444-014 60 8.3 2 BK7
444-015 60 8.3 3 BK7
444-016 60 8.3 4 BK7

Circular ND filters provide continuously variable, linear attenuation of incident light by rotating the filter about its center. The transmitted intensity is varied as a function of the optical density range. Hangzhou Shalom EO supplies the Circular Variable ND Filters with OD1, OD2, OD3 and OD4 in Diameter 20-100mm, standard types are available for fast delivery and customized filters is available upon request.