Avian Technologies offers four types of wavelength calibration standards: Rare Earth Oxide Standards, UV-Vis Calibration Standards, Near-Infrared Calibration Standards, and Long Wavelength Range Wavelength Calibration Standards.
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).
UV-Vis Calibration Standards
Avian Technologies UV-Vis Wavelength Calibration Standards are a mixture of holmium and erbium oxides in an inert, durable, spectrally neutral matrix. Calibrations are traceable to the National Research Council Canada (NRC) and NIST. These standards, calibrated from 250-850 nm, are ideal for the calibration of UV-Vis spectrophotometers.
Standards are available in 1.25″ (37mm) and 2.0″ (50.8mm) diameter sizes, and come in a Delrin holder with cover.
Near-Infrared Calibration Standards
Avian Technologies Near-Infrared Wavelength Calibration Standards are a mixture of dysprosium, holmium, and erbium oxides in an inert, durable, spectrally neutral matrix. Calibration is traceable to the NRC and NIST. These standards are ideal for calibration of Vis-NIR spectrophotometers.
Standards are available in 1.25″ (37 mm) and 2″ (51 mm”) diameter sizes, and come in a Delrin holder with cover.
Long Wavelength Calibration Standards
This Avian Technologies standard combines NIST 2065 glass (Avian Technologies WCT-2065) and polystyrene in a package with a Fluorilon-99W™ backing to give a wavelength standard with useable peaks beyond 2300 nm, to meet the calibration needs for modern portable near-infrared spectrometers.
The standard size is 1.25” diameter (0.950” active area), and is mounted in a Thorlabs MR1 filter mount with a 2” mounting post.. Full calibration data, traceable to NIST/NRC, is provided with each standard.
This standard is also available in a transmittance format.