Holmium glass filter (270 - 640 nm)

for checking the wavelength accuracy

The holmium glass filter 666-F1 has a range of narrow, well defined peaks in the UV and visible range, making holmium an excellent choice for checking the wavelength scale of spectrophotometers. In comparison to filters that use holmium solution (Holmium liquid filter), the holmium glass filter has a weaker spectrum with fewer peaks. In the low UV range the absorbance behavior of the glass matrix is superimposed on the holmium peaks. The main advantage of using a glass filter over a liquid filter is that it is more robust.

Typical spectrum of a holmium glass filter, measured with a slit width of 1 nm.


ARTICLE-NO. 666F1-339    Request this article
APPLICATION Checking the wavelength accuracy in the UV and Vis range
CONTENT Holmium glass with metal frame
STANDARD MEASUREMENT Wavelengths: 279, 361, 453, 536, 638 nm
Slit width: 1 nm; with DAkkS calibration certificate
POSSIBLE MEASUREMENTS Wavelengths: 279, 287, 361, 418, 445, 453, 460, 536, 638 nm
Slit width: 1 - 2 nm



The positions of holmium peaks may vary slightly depending on the glass batch used. This is why Hellma Analytics measures each holmium glass filter individually.

Optical Reference Materials (Brochure & User Manual EN)



Hellma USA Inc.
120 Terminal Drive
11803 Plainview, NY
United States

Phone: +1 5169 3908 88


Disabled, please use email.