optical-crown-glass-metallic-neutral-density-filters

optical crown glass metallic neutral density filters with square and round nd filter shown

Specifications

Technical Specs

Wavelength Range
400-1200 nm
Angle of Incidence
0°
Material
B270 Optical Crown Glass or Equivalent
Damage Threshold
30 W/cm² CW, typical; not recommended for pulsed laser use
Size Tolerance
+0/-0.50 mm
Thickness
3.0 mm
Thickness Tolerance
±0.25 mm
Surface Flatness
≤5λ at 632.8 nm over the clear aperture

Surface Quality
60-40 scratch-dig
Clear Aperture
≥central 80% of dimensions
Wedge
≤5 arc min
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics

Wavelength Range
400-1200 nm
Angle of Incidence
0°
Material
B270 Optical Crown Glass or Equivalent
Damage Threshold
30 W/cm² CW, typical; not recommended for pulsed laser use
Size Tolerance
+0/-0.50 mm
Thickness
3.0 mm
Thickness Tolerance
±0.25 mm
Surface Flatness
≤5λ at 632.8 nm over the clear aperture

Surface Quality
60-40 scratch-dig
Clear Aperture
≥central 80% of dimensions
Wedge
≤5 arc min
Chamfers
0.25–0.76 mm face width
Chamfers Angle Tolerance
45° ±15°
Cleaning
See How to Clean Optics