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Holmium Oxide Glass Filter


Holmium Oxide Glass Filter

The spectrum shows 11 characteristic and well-defined peaks covering the wavelength range from 240 nm to 640 nm.

Spectrophotometer Visible Wavelength Qualification Holmium Oxide Glass Reference

The holmium glass filter produces characteristic peaks that make it suitable for use as a wavelength reference material in the UV and visible regions of the spectrum (240 nm - 640 nm).

It is accepted for this purpose by the following bodies:

  • American Society for Testing and Materials
  • Therapeutic Goods Administration (Australia)
  • British Pharmacopoeia

Approximate peak wavelength values (in nm) are: 242, 279, 288, 334, 361, 419, 446, 454, 460, 537, 638