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DIDYMIUM CERTIFIED GLASS FILTER WITH NIST TRACEABLE CERTIFICATE

DIDYMIUM CERTIFIED GLASS FILTER WITH NIST TRACEABLE CERTIFICATE

Product Details:

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Product Description

DIDYMIUM CERTIFIED GLASS FILTER

WITH NIST TRACEABLE CERTIFICATE MADE IN U.K.

Description: Didymium glass filter.
Primary Usage: Assessment of wavelength scale accuracy in the visible/near NIR region.
Useable range: 430 nm to 890 nm, instruments with SBW of less than 10 nm.
Physical Configuration: Glass filters 'stress free' mounted in anodised aluminium holder.


Consists of: one filter, "stress free" mount in a proprietary NIST design, with certified peak at spectral bandwidth values of 0.10 nm, 0.25 nm, 0.50 nm, 1.00 nm, 1.50 nm, 2.00 nm, 3.00nm.

 

Product Description:
Like its liquid counterpart, the didymium glass filter produces characteristic peaks that make it suitable for use as a wavelength reference material in the high end visible/near NIR region. As a solid material it is physically more robust than the liquid cell, and can therefore be used in a more demanding environment, providing care is still taken to avoid scratching the surface of the filter. By individually certifying each filter, uncertainty caused by variations in peak positions (observed from melt to melt of the glass)  is significantly reduced to acceptable levels (± 0.2 nm)

 

All filter Certified Reference Materials are manufactured to the same optical tolerances required by the primary National Physical Reference Laboratories around the World. After assembly under controlled conditions, the filters are then certified by the procedure described below.
Calibration procedure:
Traceability:

Primary instrumental wavelength calibration is established using the emission lines from mercury and deuterium sources.
Additional traceability: links to NIST primary materials are established using SRM 2034 holmium oxide (4% m/v) in perchloric acid (10% v/v).

Use:
All appropriate fundamental parameters and procedures relating to measurement, handling and storage are fully documented on the certificate supplied with each Certified Reference Material.

Typical values obtained:

SBW

nm

nm

nm

nm

nm

nm

nm

nm

nm

nm

nm

0.10

879.40

805.40

748.82

741.63

684.62

587.44

574.35

528.93

513.35

481.13

440.30

0.25

879.40

805.36

748.52

741.05

684.59

587.06

573.09

528.93

513.47

481.08

440.40

0.50

879.30

805.74

748.62

741.15

684.47

587.01

573.03

528.91

513.36

480.99

440.50

1.00

879.36

805.48

748.54

741.07

684.53

587.39

573.07

528.99

513.51

480.99

440.38

1.50

879.44

805.52

748.58

740.70

684.62

587.16

573.19

528.95

513.37

480.92

440.50

2.00

879.44

805.46

748.59

740.46

684.55

587.34

573.32

528.92

513.51

480.75

440.41

3.00

879.36

805.48

748.54

741.07

684.53

587.39

573.07

528.99

513.51

480.99

440.38


NATIONAL ANALYTICAL CORPORATION

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