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Home > Frequently Asked Questions > Calibration > Light Sources (Radiometric) > How does OceanView software combine the UV and Visible calibration results for a deuterium-tungsten halogen source?

How does OceanView software combine the UV and Visible calibration results for a deuterium-tungsten halogen source?

Calibration light sources are optimized for either a UV or visible range. The DH-2000-CAL houses two separate light sources that are operated in turn to calibrate a single spectrometer for both the UV and visible range. A separate calibration file is created for each light source within the DH-2000-CAL (deuterium and tungsten halogen), which are then combined into one file within the software.

The dominant portions of the two curves will be combined at an overlap point around 400 nm. Either UV or visible can be chosen as the dominant wavelength range. The other curve will then be “stretched” toward the dominant curve to create a smooth transition at the combination wavelength of 400 nm. Note that the “stretching” process assumes that one of the calibrations is more accurate than the other.

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