Rare Earth Oxide Standards
Avian Technologies’ Rare Earth Oxide wavelength calibration standards display sharp absorbance peaks over much of the UV-Vis-NIR spectral range, and are designed for calibration of UV-Vis-NIR spectrometers. The mixture of rare earth oxides is chosen to give the best coverage over the wavelength range of interest.
We offer three rare earth oxide standards:
Packed Powder Wavelength Calibration Standard
This standard is a mixture of highly purified holmium oxide, dysprosium oxide, and erbium oxide in a hermetically sealed black anodized aluminum holder with either 2″ (52mm) or 1.5″ (37 mm) optical glass window. The standard has the same components as NIST SRM-1920a*. The standards are made in large batches and each batch is calibrated traceable to NIST/NRC.
Encapsulated Vis-NIR Standard
This standard complements our encapsulated gray scale standards . The standard has the same components as NIST SRM-1920a*, with a small amount of an inert, spectrally non-absorbing binder, encased in a hermetically sealed Delrin holder. Unlike sintered equivalents of SRM-1920a, this standard exhibits no peak shifting and is both durable and stable. The spectral features are the same as our packed powder wavelength calibration standard. The standard is also available in two extended versions, with the addition of either talc or a polystyrene window to provide extra peaks in the longer wavelength range.
Wavelength Reflectance Standard
The reflectance version of our transmittance wavelength calibration standard is the equivalent of NIST SRM-2036. This standard is ideal for calibration of the wavelength scale of both scanning and Fourier transform near-infrared spectrometers used in the reflectance configuration. The standard consists of a 1.0” diameter WCT-2065 filter backed with Avian Technologies Fluorilon™ FW-99 diffuse reflectance material, in a black anodized aluminum holder designed to fit most spectrometers. This standard is usable in the 320-2200 nm range, and is available calibrated or uncalibrated.
*For detailed information on SRM-1920a, refer to NIST Special Publication SP-250-48 (Spectral Reflectance).
