ND Filters

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Optical filters that aim to produce a constant reduction in the intensity of light across a specific (typically broadband) wavelength range.

Product	Optical Density	Substrate	Transmittance	Availability	Price (USD)
Absorptive ND Filter	3	-	0.1%	In stock	$ 60.00
Product Code Wavelength Range 300 - 1200 nm (Blocking Range) Transmittance 0.1% Diameter 10 mm Dimensions Ø 10 mm Optical Density 3 Blocking Wavelength Range 300 - 1200 nm Shape Round Mount Non-Threaded Mount, 10 mm Supplier Location Vermont, USA Selected Product Option Mounted 10mm R R=Mounted in Ring See product details More from Chroma
Absorptive ND Filter	0.9	Float Glass	12.5% (Minimum)	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 400 - 700 nm (Operating Range) Coating Inconel Reflectance 50% Transmittance 12.5% (Minimum) Diameter 12.5 mm Dimensions Ø 12.5 mm Thickness 1.5 mm Parallelism < 3' Optical Density 0.9 Substrate Float Glass Shape Round Surface Quality 80-50 scratch-dig Clear Aperture 10 mm Supplier Location Vermont, USA See product details More from omega optical
Absorptive ND Filter	5	NG9	~ 0.001%	Contact Supplier	$ 153.00
Product Code Wavelength Range 400 - 1595 nm Transmittance ~ 0.001% Diameter 22.5 mm (Aperture) Dimensions Ø 22.5 mm Thickness 11.4 mm Parallelism < 3' Optical Density 5 Substrate NG9 Shape Round Surface Quality 40-20 scratch-dig Mount Threaded Mount, SM, SM1 Clear Aperture 20.25 mm Transmitted Wavefront Error < λ/10 (633 nm) Weight 40 g Mounting Thread SM1 Maximum Optical Power 1 W Accessory For BEAMAGE-4M BEAMAGE-4M-IR Accessories B3-SM1 SA-19 SM2-SM1 Supplier Location Canada See product details More from Gentec-EO
Absorptive ND Filter	0.1	Filter Glass	79.43%	1 weeks	$ 231.00
Product Code Wavelength Range 450 - 700 nm Transmittance 79.43% Dimensions 50 x 50 mm Thickness 4.95 mm Parallelism 30'' Optical Density 0.1 Substrate Filter Glass Shape Square Surface Quality 80-50 scratch-dig Mount Unmounted Clear Aperture 45 x 45 mm Transmitted Wavefront Error λ/4 (per inch) Surface Irregularity λ/4 (Flatness) Applications Imaging, Machine Vision Operating Temperature 100 °C (Maximum) Supplier Location New Hampshire, USA See product details More from Andover
Absorptive ND Filter	0.09691	-	80%	In stock	$ 150.00
Product Code Wavelength Range 300 - 1200 nm (Blocking Range) Transmittance 80% Diameter 45 mm Dimensions Ø 45 mm Optical Density 0.09691 Blocking Wavelength Range 300 - 1200 nm Shape Round Mount Non-Threaded Mount, 45 mm Supplier Location Vermont, USA Selected Product Option Mounted 45mm R R=Mounted in Ring See product details More from Chroma
Absorptive ND Filter	4 (546 nm)	NG3	0.01% (546 nm)	Contact Supplier	$ 58.49
Product Code Transmittance 0.01% (546 nm) Dimensions 50 x 50 x 3.9 mm Thickness 3.9 mm Optical Density 4 (546 nm) Substrate NG3 Shape Square Surface Quality < 60-40 scratch-dig Diameter Tolerance +0/-0.2 mm Length 50 mm Width 50 mm Length Tolerance ±0.2 mm Width Tolerance ±0.2 mm Supplier Location United Kingdom; Rhode Island, USA See product details More from Knight Optical
Absorptive ND Filter	3	NG9	~ 0.1%	Contact Supplier	$ 330.00
Product Code Wavelength Range 400 - 1595 nm Transmittance ~ 0.1% Diameter 48 mm (Aperture) Dimensions Ø 48 mm Thickness 11.4 mm Parallelism < 3' Optical Density 3 Substrate NG9 Shape Round Surface Quality 40-20 scratch-dig Mount Threaded Mount, SM, SM2 Clear Aperture 43.2 mm Transmitted Wavefront Error < λ/10 (633 nm) Weight 40 g Mounting Thread SM2 Maximum Optical Power 1 W Accessory For BEAMAGE-4M-FOCUS Accessories FOCUS-SM2 Supplier Location Canada See product details More from Gentec-EO
Absorptive ND Filter	1.03 (900 nm, Center)	Neutral Density Glass	20% (400 - 700 nm, Average)	In stock	$ 55.00
Product Code Wavelength Range 600 - 1050 nm Coating BBAR (600 - 1050 nm) Reflectance < 0.5% (600 - 1050 nm, Average) Transmittance 20% (400 - 700 nm, Average) Diameter 12.5 mm Dimensions Ø 12.5 mm Thickness 3.1 mm Optical Density 1.03 (900 nm, Center) Substrate Neutral Density Glass Blocking Wavelength Range 400 - 700 nm Shape Round Surface Quality 80-50 scratch-dig Thickness Tolerance ±0.5 mm Refractive Index 1.51 Coating Features Broadband Supplier Location New Jersey, USA See product details More from Edmund Optics
Absorptive ND Filter	0.05	Color Glass	89% (546 nm)	Contact Supplier	$ 74.00
Product Code Wavelength Range 450 - 650 nm Center Wavelength 450 - 650 nm Transmission Wavelength 546 nm Transmittance 89% (546 nm) Diameter 50.8 mm (2") Dimensions Ø 50.8 mm (2") Parallelism 3' Optical Density 0.05 Substrate Color Glass Shape Round Surface Quality 60-40 scratch-dig Clear Aperture Ø 45.72 mm Surface Irregularity λ (633 nm, Flatness) Supplier Location Lithuania See product details More from EKSMA Optics
Absorptive ND Filter	0.9	Float Glass	12.5% (Minimum)	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 400 - 700 nm (Operating Range) Coating Inconel Reflectance 50% Transmittance 12.5% (Minimum) Dimensions 50 x 50 mm (±0.5 mm) Thickness 1.5 mm Parallelism < 3' Optical Density 0.9 Substrate Float Glass Shape Square Surface Quality 80-50 scratch-dig Clear Aperture 40 x 40 mm Supplier Location Vermont, USA See product details More from omega optical
Absorptive ND Filter	0.2	Color Glass	63% (546 nm)	4 - 5 days	$ 73.00
Product Code Wavelength Range 450 - 650 nm Center Wavelength 450 - 650 nm Transmission Wavelength 546 nm Transmittance 63% (546 nm) Dimensions 50.8 x 50.8 mm Parallelism 3' Optical Density 0.2 Substrate Color Glass Shape Square Surface Quality 60-40 scratch-dig Clear Aperture 45.72 x 45.72 mm Diameter Tolerance +0/-0.2 mm Surface Irregularity λ (633 nm, Flatness) Supplier Location Lithuania See product details More from EKSMA Optics
Absorptive ND Filter	2	NG9	1% (2 OD, 850 nm)	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 850 nm Transmission Wavelength 850 nm Transmittance 1% (2 OD, 850 nm) Dimensions 30 x 30 mm Optical Density 2 Substrate NG9 Shape Square Chamfer < 0.3 mm Supplier Location Netherlands See product details More from PHYSIX Photonics
Absorptive ND Filter	3	Germanium	0.1%	Contact Supplier	Add to cart to request quote
Product Code Transmittance 0.1% Diameter 50 mm Dimensions Ø 50 mm Optical Density 3 Substrate Germanium Shape Round Supplier Location Vermont, USA See product details More from omega optical
Absorptive ND Filter	4.84 (Average)	NG1	0.001% (Minimum)	In stock	$ 97.00
Product Code Manufacturer SCHOTT Coating Uncoated Transmittance 0.001% (Minimum) Dimensions 50 x 50 mm Thickness 1 mm Parallelism < 3' Optical Density 4.84 (Average) Substrate NG1 Shape Square Surface Quality 60-40 scratch-dig Thickness Tolerance ±0.1 mm Refractive Index 1.52 Length 50 mm Width 50 mm Supplier Location New Jersey, USA See product details More from Edmund Optics
Absorptive ND Filter	0.09691	-	80%	In stock	$ 60.00
Product Code Wavelength Range 300 - 1200 nm (Blocking Range) Transmittance 80% Diameter 10 mm Dimensions Ø 10 mm Optical Density 0.09691 Blocking Wavelength Range 300 - 1200 nm Shape Round Mount Non-Threaded Mount, 10 mm Supplier Location Vermont, USA Selected Product Option Mounted 10mm R R=Mounted in Ring See product details More from Chroma
Absorptive ND Filter	0.9031	Optical Glass (N/S)	12.5% (400 - 700 nm)	6 - 12 weeks	$ 31.00
Product Code Wavelength Range 380 - 700 nm Transmission Wavelength 400 - 700 nm Transmittance 12.5% (400 - 700 nm) Diameter 10 mm Dimensions Ø 10 mm Optical Density 0.9031 Substrate Optical Glass (N/S) Shape Round Mount Unmounted Weight 5 g Transmittance Tolerance ±2% Supplier Location California, USA See product details More from OptoSigma
Absorptive ND Filter	0.3 (546 nm)	NG11	50% (546 nm)	Contact Supplier	$ 58.49
Product Code Transmittance 50% (546 nm) Dimensions 50 x 50 x 2.3 mm Thickness 2.3 mm Optical Density 0.3 (546 nm) Substrate NG11 Shape Square Surface Quality < 60-40 scratch-dig Diameter Tolerance +0/-0.2 mm Length 50 mm Width 50 mm Length Tolerance ±0.2 mm Width Tolerance ±0.2 mm Supplier Location United Kingdom; Rhode Island, USA See product details More from Knight Optical
Absorptive ND Filter	3	Float Glass	0.1% (Minimum)	Contact Supplier	Add to cart to request quote
Product Code Wavelength Range 400 - 700 nm (Operating Range) Coating Inconel Reflectance 55% Transmittance 0.1% (Minimum) Diameter 25 mm Dimensions Ø 25 mm Thickness 1.5 mm Parallelism < 3' Optical Density 3 Substrate Float Glass Shape Round Surface Quality 80-50 scratch-dig Clear Aperture 20 mm Supplier Location Vermont, USA See product details More from omega optical
Absorptive ND Filter	0.68 (1550 nm)	KG2	20.89% (1550 nm)	Contact Supplier	$ 71.76
Product Code Wavelength Range 1000 - 2600 nm Center Wavelength 1550 nm Coating Uncoated Transmittance 20.89% (1550 nm) Diameter 25 mm Dimensions Ø 25 mm Thickness 1.1 mm (Substrate) Parallelism < 10'' Optical Density 0.68 (1550 nm) Substrate KG2 Blocking Wavelength Range 1000 - 2600 nm Shape Round Surface Quality 40-20 scratch-dig Mount Threaded Mount, SM, SM1 Clear Aperture > 22.5 mm Diameter Tolerance +0/-0.2 mm Transmitted Wavefront Error < λ/4 (633 nm) Supplier Location New Jersey, USA See product details More from Thorlabs
Absorptive ND Filter	0.699	Optical Glass (N/S)	20% (400 - 700 nm)	6 - 12 weeks	$ 36.00
Product Code Wavelength Range 380 - 700 nm Transmission Wavelength 400 - 700 nm Transmittance 20% (400 - 700 nm) Dimensions 20 x 20 mm Optical Density 0.699 Substrate Optical Glass (N/S) Shape Square Mount Unmounted Weight 5 g Length 20 mm Transmittance Tolerance ±2% Supplier Location California, USA See product details More from OptoSigma