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Circular Variable Metallic ND Filter, N-BK7, 127 mm, 0.05-2.0 OD
The 50G02AV.2 Circular Variable Metallic ND Filter is a circular variable metallic neutral density filter, made of N-BK7 glass. It is 127 mm in diameter with surface flatness of ≤1λ , and coated for an OD range of 0.05-2.0. Our circular variable neutral density filters are designed to simplify attenuation and beam splitting in the visible to NIR. The variable attenuation and beam splitting around a 270° circle is achieved by a thin, reflective aluminum film. A broadband, visible AR coating on the back side allows the filter to be left in the beam path at all times with minimal losses or ghost images.
Specifications
Size
Ø127.0 mm
Optical Density
0.05 - 2
Optical Density Tolerance
±0.15 over 270° @ 0° AOI
Material
N-BK7
Damage Threshold
75 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at the specified wavelength, typical
Size Tolerance
+0/-0.25 mm
Thickness
9.53 mm
Thickness Tolerance
±0.38 mm
Surface Quality
30-10 scratch-dig
Clear Aperture
From 33 mm to 101 mm diameter
Chamfers
0.50–1.52 mm face width
Chamfers Angle Tolerance
45° ±15°
Durability
Metalized area MIL-M-13508C, AR coated area MIL-C-675, moderate abrasion
Inside Diameter
25.4 mm
Cleaning
Size
Ø127.0 mm
Optical Density
0.05 - 2
Optical Density Tolerance
±0.15 over 270° @ 0° AOI
Material
N-BK7
Damage Threshold
75 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at the specified wavelength, typical
Size Tolerance
+0/-0.25 mm
Thickness
9.53 mm
Thickness Tolerance
±0.38 mm
Surface Quality
30-10 scratch-dig
Clear Aperture
From 33 mm to 101 mm diameter
Chamfers
0.50–1.52 mm face width
Chamfers Angle Tolerance
45° ±15°
Durability
Metalized area MIL-M-13508C, AR coated area MIL-C-675, moderate abrasion
Inside Diameter
25.4 mm
Cleaning
