Kính lọc chuẩn 666F1-339

Hãng sản xuất: HELLMA

Holmium glass filter (279 – 638 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.
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Holmium glass filter (279 – 638 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   
APPLICATION Checking the wavelength accuracy in the UV and Vis range
CONTENT Holmium glass with metal frame
STANDARD CERTIFICATION Wavelengths: 279, 361, 453, 536, 638 nm
Slit width: 1 nm; with DAkkS calibration certificate
POSSIBLE CERTIFICATION Wavelengths: 279, 287, 361, 418, 445, 453, 460, 536, 638 nm
Slit width: all up to 2 nm
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