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Circular Variable Neutral Density Filters

Circular Variable Neutral Density Filters

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Circular Variable Neutral Density Filters

Circular ND filters provide continuously variable, linear attenuation of light by rotating the filter about its center.

Clear Aperture, %	>90%
Diameter Tolerance, mm	+0.0/-0.1 mm
Inside Diameter, mm	8.0 mm
Operating Wavelength Range, nm	380 nm - 2000 nm (BK7)250 nm - 2500 nm (UVFS)
Parallelism, arcsec	<3 arcmin
Protective chamfers	<0,25 mm x 45 deg
Surface Flatness	<λ @ 632.8 nm
Surface Quality, S-D	60/40 S/D

Description

Details

Transmitted intensity varies as a function of the optical density range. The filter can be used for white light as well as for lasers. A large finite aperture can be attenuated by counter rotating two filters in series. Sizes are available from 25 mm to over 100 mm in diameter.

Features

Circular Variable Neutral Density filter is economical solution to attenuate light

Name	Average Transmission in VIS, %	Optical Density Range	Substrate Material	Substrate size, mm	Wavelength Range, nm	Price	Quantity
1-CNF-1-A025	90 to 10	0.04 to 1.0	BK7	Ø25	380-2000 nm	US$115.70
1-CNF-1-A050	90 to 10	0.04 to 1.0	BK7	Ø50	380-2000 nm	US$170.30
1-CNF-1-A100	90 to 10	0.04 to 1.0	BK7	Ø100	380-2000 nm	US$241.80
1-CNF-1-B025	90 to 10	0.04 to 1.0	UVFS	Ø25	250-2500 nm	US$128.70
1-CNF-1-B050	90 to 10	0.04 to 1.0	UVFS	Ø50	250-2500 nm	US$189.80
1-CNF-1-B100	90 to 10	0.04 to 1.0	UVFS	Ø100	250-2500 nm	US$302.90
1-CNF-2-A025	90 to 1	0.04 to 2.0	BK7	Ø25	380-2000 nm	US$115.70
1-CNF-2-A050	90 to 1	0.04 to 2.0	BK7	Ø50	380-2000 nm	US$170.30
1-CNF-2-A100	90 to 1	0.04 to 2.0	BK7	Ø100	380-2000 nm	US$241.80
1-CNF-2-B025	90 to 1	0.04 to 2.0	UVFS	Ø25	250-2500 nm	US$128.70
1-CNF-2-B050	90 to 1	0.04 to 2.0	UVFS	Ø50	250-2500 nm	US$189.80
1-CNF-2-B100	90 to 1	0.04 to 2.0	UVFS	Ø100	250-2500 nm	US$302.90
1-CNF-3-A025	90 to 0.1	0.04 to 3.0	BK7	Ø25	380-2000 nm	US$122.20
1-CNF-3-A050	90 to 0.1	0.04 to 3.0	BK7	Ø50	380-2000 nm	US$183.30
1-CNF-3-A100	90 to 0.1	0.04 to 3.0	BK7	Ø100	380-2000 nm	US$263.90
1-CNF-3-B025	90 to 0.1	0.04 to 3.0	UVFS	Ø25	250-2500 nm	US$132.60
1-CNF-3-B050	90 to 0.1	0.04 to 3.0	UVFS	Ø50	250-2500 nm	US$196.30
1-CNF-3-B100	90 to 0.1	0.04 to 3.0	UVFS	Ø100	250-2500 nm	US$309.40