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Square Neutral Density Filters

Dual Band Infrared Bandpass Filters
Reynard Corporation
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Dual Band Infrared Bandpass Filters
Reynard dual-band infrared (IR) bandpass optical filters provide high in-band transmission in both the MWIR (mid-wave, 3-5μm range) and the LWIR (long-wave, 7.5-13.5μm range) simultaneously, while providing high out-of-band (OOB) rejection. In-band transmission levels above 90% have been demonstrated on multiple substrate ...

Specifications
Attenuator Type: Absorptive, Reflective, Other
Shape: Round, Square, Custom
Size: Custom mm
Optical Density: Specify
Material: Ge, InAs, ZnS, ZnSe and others
...
Data Sheet
Bullseye® Apodizing Optical Filters
Reynard Corporation
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Bullseye® Apodizing Optical Filters
Reynard Corporation offers Bullseye® Apodizing optical filters used to eliminate undesirable intensity variations in optical systems. There are two types: Dark Center: The normal Bullseye® Apodizing configuration decreases in density radially from a dark center, where light is usually at its peak intensity, to the outside ...

Specifications
Attenuator Type: Other
Shape: Round, Square, Custom
Size: 25 to 50 ± 0.2 mm
Optical Density: 1-5, Specify
Substrate Material: N-BK7
...
Data Sheet
Linear Apodizing Filters
Reynard Corporation
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Linear Apodizing Filters
Linear Apodizing optical filters are customizable density gradient filters that have constant density in one direction and variable neutral density (ND) filter in the other direction. These linear apodizing optical filters are used to eliminate undesirable intensity variations in optical systems. There are two basic types of linear ...

Specifications
Attenuator Type: Other
Shape: Round, Square, Custom
Size: 25 - 125 mm
Optical Density: 1-5, Specify
Substrate Materials:: N-BK7 or equivalent
...
Data Sheet
CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7
Hellma USA INC
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CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7
Quality assurance and quality control regulations, such as ISO 9000, GLP, GMP and pharmacopoeias, require companies to verify that any spectrophotometers in use are performing at a consistently high level. Hellma Analytics' certified reference materials can be used to test the following parameters easily and ...

Specifications
Attenuator Type: Other
Shape: Square
Size: - mm
Optical Density: -
Certified Wavelengths: 329, 472, 512, 681, 875 nm
...
Data Sheet
CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S004
Hellma USA INC
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CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S004
Quality assurance and quality control regulations, such as ISO 9000, GLP, GMP and pharmacopoeias, require companies to verify that any spectrophotometers in use are performing at a consistently high level. Hellma Analytics' certified reference materials can be used to test the following parameters easily and ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: - mm
Optical Density: 0.3, 1.5, 2.0 Abs
Certified Wavelengths: 440, 465, 546.1, 590, 635 nm
...
Data Sheet
CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S003
Hellma USA INC
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CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S003
Quality assurance and quality control regulations, such as ISO 9000, GLP, GMP and pharmacopoeias, require companies to verify that any spectrophotometers in use are performing at a consistently high level. Hellma Analytics\' certified reference materials can be used to test the following parameters easily and ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: - mm
Optical Density: 0.25, 0.5, 1.0, F7 0.5-1.0
Certified Wavelengths: 279, 361, 453, 536, 638 nm
...
Data Sheet
CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S000
Hellma USA INC
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CRM NEUTRAL DENSITY GLASS FILTER SET WITH DAKKS CERTIFICATE 666-S000
Quality assurance and quality control regulations, such as ISO 9000, GLP, GMP and pharmacopoeias, require companies to verify that any spectrophotometers in use are performing at a consistently high level. Hellma Analytics\' certified reference materials can be used to test the following parameters easily and ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: - mm
Optical Density: 0.25, 0.5, 1.0 Abs
Certified Wavelengths: 279, 361, 453, 536, 638 nm
...
Data Sheet
CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7A
Hellma USA INC
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CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7A
Quality assurance and quality control regulations, such as ISO 9000, GLP, GMP and pharmacopoeias, require companies to verify that any spectrophotometers in use are performing at a consistently high level. Hellma Analytics' certified reference materials can be used to test the following parameters easily and ...

Specifications
Attenuator Type: Other
Shape: Square
Size: - mm
Optical Density: -
Certified Wavelengths: 270, 280, 297, 321, 342 nm
...
Data Sheet
Andover Corporation Metallic Neutral Density Filters UV-VIS-NIR
Andover Corporation
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Andover Corporation Metallic Neutral Density Filters UV-VIS-NIR
The Andover Corporation Metallic Neutral Density Filters UV-VIS-NIR are a type of absorptive neutral density (ND) filter that are ideal for a range of applications such as calibration, attenuation, low-power lasers, scientific measurements and research, machine vision, and other imaging applications.    These filters ...

Specifications
Attenuator Type: Other
Shape: Round, Square, Custom
Size: 12.5 mm
Optical Density: 0.4
Nominal Transmission: 91.0 %
Data Sheet
Neutral Density Filter-Absorptive
Union Optic
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Neutral Density Filter-Absorptive
These are Neutral Density Filters (Absorptive type). They are made of absorptive glass and feature 80/50 scratch/dig quality.  Please contact us for details and ordering info.

Specifications
Attenuator Type: Absorptive
Shape: Round, Square, Custom
Size: 25.4 mm
Optical Density: 0.1-3
Design Wavelength: 400 - 700 nm
...
Data Sheet
25.4 mm Absorptive ND Filter Optical Density - 0.1
Ealing Catalog
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25.4 mm Absorptive ND Filter Optical Density - 0.1
This series of absorbing glass neutral density filters is offered in small increments from D=0.1 up to D=4. The thickness of the filters is controlled to produce a calibrated optical density at 546 nm. The response is approximately neutral so they can be used as broad band devices. However, if used at other wavelengths the optical ...

Specifications
Attenuator Type: Absorptive
Shape: Round, Square
Size: 25.4 mm
Optical Density: 0.1
Data Sheet
Variable Neutral Density Filter
Union Optic
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Variable Neutral Density Filter
Material B270 Glass Dimension Tolerance +0.0/-0.2mm Thickness 1.5±0.2mm Flatness <2λ@632.8nm Surface Quality 60/40 scratch and dig Parallelism <3 arc minutes Clear Aperture >90% Design Wavelength 400-700nm Coating Metallic reflective coating OD Tolerance ±5% of OD Extremes

Specifications
Attenuator Type: Other
Shape: Round, Square, Custom
Size: 50 mm
Optical Density: 0-3
Data Sheet
Neutral Density Filter-Reflective
Union Optic
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Neutral Density Filter-Reflective
Material B270 Glass Dimension Tolerance +0.0/-0.2mm Thickness 2.0±0.2mm Flatness 2λ@632.8nm Surface Quality 80/50 scratch and dig Parallelism <5 arc minutes Clear Aperture >90% Design Wavelength 400-700nm Coating Metallic reflective coating OD Tolerance ±10% of OD

Specifications
Attenuator Type: Reflective
Shape: Round, Square, Custom
Size: 25.4 mm
Optical Density: 0.1-3
Data Sheet
FNG4050 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG4050 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 4.0
Data Sheet
FNG3050 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG3050 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50x50 mm
Optical Density: 0.1
Data Sheet
FNG2550 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG2550 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 2.5
Data Sheet
FNG2050 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG2050 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 2.0
Data Sheet
FNG1550 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG1550 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 1.5
Data Sheet
FNG0850 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG0850 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 0.8
Data Sheet
FNG0650 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG0650 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 0.6
Data Sheet
FNG0550 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG0550 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 0.5
Data Sheet
FNG0450 - Absorptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG0450 - Absorptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 0.4
Data Sheet
FNG0250 - Aborptive Glass Neutral Density Filters
Knight Optical (UK) Ltd
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FNG0250 - Aborptive Glass Neutral Density Filters
Glass Neutral Density filters attenuate light by absorption just like the gelatine neutral density filters. Glass ND Filters are more robust and tend to have more uniform absorption characteristics. They also attenuate by absorption and so care must be taken to avoid overheating. Attenuation is achieved by polishing glass ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 0.2
Data Sheet
FNP3050 - Gelatine Neutral Density Filters
Knight Optical (UK) Ltd
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FNP3050 - Gelatine Neutral Density Filters
Neutral density filters attenuate light by a constant amount that is, to first order, independent of the wavelength. Gelatin ND filters are the cheapest but tend to have more fluctuation with wavelength and a narrower wavelength range than glass ND filters and metallic types.  Gelatine neutral density filters work by absorption ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 3.0
Data Sheet
FNP4050 - Gelatine Neutral Density Filters
Knight Optical (UK) Ltd
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FNP4050 - Gelatine Neutral Density Filters
Neutral density filters attenuate light by a constant amount that is, to first order, independent of the wavelength. Gelatin ND filters are the cheapest but tend to have more fluctuation with wavelength and a narrower wavelength range than glass ND filters and metallic types.  Gelatine neutral density filters work by absorption ...

Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 4.0
Data Sheet
On FindLight marketplace you will find 27 different Square Neutral Density Filters from suppliers around the world. With just a few clicks you can compare different Square Neutral Density Filters and get accurate price quotes based on your needs and quantity required. Note that some wholesale suppliers may offer discounts for large quantities. From any product page you can directly contact any vendor within seconds.