Holmium Oxide Glass + 1A Neutral Density

Artikelnummer: RM-HG/1ND
Kategorie: Wavelength Accuracy
Hersteller: STARNA

Holmium Neutralglasfilter

724,70 €

exkl. 19% USt. , zzgl.

Lieferzeit: 21 - 24 Werktage (DE - Ausland abweichend)

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This filter is a useful tool for routinely checking the wavelength and absorbance accuracy of a visible spectrophotometer. Like its liquid counterpart, the holmium glass filter produces characteristic peaks that make it suitable for use as a wavelength reference material in the visible region of the spectrum. In this filter, the holmium glass is optically bonded a neutral density filter giving a nominal 1A background absorbance that can be used to check the absorbance accuracy of the instrument.

Glass filter containing holmium oxide, bonded to a neutral density filter and mounted stress free in an anodised aluminium holder. Sliding window covers are provided to protect the surface from damage when not in use. Variations from melt to melt of the glass can cause small uncertainties in peak position, so each Starna filter is individually certified.

7 characteristic and well-defined peaks can be certified, covering the wavelength range from 360 nm to 640 nm. This spectrum is superimposed on a constant background absorbance, nominally 1A.

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