– UV and Visible Wavelength
Didymium glass has been used for many years as a
high wavelength visible reference material. When prepared in perchloric
acid, didymium gives a spectral scan containing a series of sharp
characteristic peaks that extend well above the useable range of the
holmium into the near NIR (680-900 nm). Again, like holmium, these
values are dependent and will vary with the spectral bandwidth of
the measuring instrument.
Consists of one sealed cell, 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 and 3.00 nm. (see
- UV and Visible Wavelength
& praesodymium) in perchloric acid.
Usage: Assessment of wavelength scale accuracy
in both UV and visible regions.
range: 290 nm to 870 nm, instruments with SBW of less than 5 nm.
Configuration: Far UV quartz cells that
have been permanently heat sealed.