Neutral Density Filters (Shape: Square)

FNP1050 - Gelatine Neutral Density Filters

FNP1050 - 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 ...

Sold by: Knight Optical (UK) Ltd Ships from: United Kingdom
Specifications
Attenuator Type: Absorptive
Shape: Square
Size: 50 mm
Optical Density: 1
CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7

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. ...

Sold by: Hellma USA INC Ships from: United States
Specifications
Certified Wavelengths: 329, 472, 512, 681, 875 nm
Optional Additional Wavelengths: 302, 329, 430, 472, 482, 512, 681, 875 nm
CRM DIDYMIUM GLASS FILTER WITH DAKKS CERTIFICATE 666-F7A

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. ...

Sold by: Hellma USA INC Ships from: United States
Specifications
Certified Wavelengths: 270, 280, 297, 321, 342 nm
Optional Additional Wavelengths: 270 - 290 nm
Neutral Density Filter-Absorptive

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.

Sold by: Union Optic Ships from: China
Specifications
Parallelism: < 5 arc minutes
Flatness: < 2λ @632.8nm
Clear Aperture: > 90 %
Surface Quality: 80/50 scratch and dig
Design Wavelength: 400 - 700 nm
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