Below are the calibration options we offer. You can always contact one of our support engineers for advice on the best option for your spectrometer and application.

Wavelength Calibrations

All AvaSpec spectrometers come standard with a wavelength calibration and coefficients, to calculate wavelength from pixel number. This information is installed on-board, on the AvaSpec’s EEPROM.
Under normal conditions the wavelength calibration does not need to be redone, since the spectrometers have no moving elements inside.

If a wavelength shift is measured versus the original wavelength calibration, the spectrometer can be recalibrated by the end-user, using the Avalight-CAL using the auto-calibration software routine in AvaSoft-Full.

As an option the spectrometer can also be returned to Avantes for recalibration, (Spectral-Cal-Service). Before returning the spectrometer an RMA authorization number needs to be obtained.

Non-Linearity Calibration

Most detectors of the AvaSpec spectrometers have a good linear behavior in their detector response, which means that there is a better than 95% correlation between raw signal in A/D counts and the light intensity at the spectrometer entrance.

However for some applications, which require a wide dynamic range, such as highly absorbing substances or low light level applications, combined with a need for high accuracy, a non-linearity calibration (NL-Calibration) of the detector is recommended. This NL-Calibration is performed on the detector array and the output signal is linearized to better than 99%. A complete calibration report and the calculated NL-Calibration coefficients are delivered with the spectrometer. For irradiance calibrations the NL-Calibration is automatically included.

Irradiance Calibration

Applications that use spectrometers to measure the light energy of radiant sour-ces require an irradiance-calibrated spectrometer. We offer NIST-traceable irradiance calibrations for all AvaSpec spectrometers. Irradiance calibrations (µW/cm2) are normally performed on a system with a fiber-optic cable and a cosine corrector or integrating sphere.

The irradiance calibrations can be performed over 3 different wavelength ranges, UV (200-400 nm), VIS (360-1100 nm) and NIR (1100-2500 nm). All systems are calibrated against a NIST-traceable irradiance calibration standard and come with a complete report and calibration files, which are stored on the EEPROM of the spectrometer and can be loaded directly into the AvaSoft-IRRAD software module to obtain irradiance parametric measurements.

As an alternative to Avantes irradiance calibration services, irradiance calibrated light sources, such as AvaLight-DH-BAL-CAL and AvaLight-HAL-CAL-Mini are available to perform your own irradiance calibration.

Avantes’ Calibration Lab

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