Apr-09 73
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3.2.3 View Menu
View Menu: Scope Mode
The display is set to Scope Mode, showing a real-time raw data signal, with on the Y-axis the readout
of the AD-converter and on the X-axis the calculated wavelength.
View Menu: Absorbance Mode
In Absorbance Mode, the absorbance at pixel n is calculated using the current sample, reference and
dark data sets in the following equation:
View Menu: Transmittance Mode
In Transmittance Mode, the transmittance at pixel n is calculated using the current sample,
reference and dark data sets in the following equation:
The percentage of transmittance is mathematically equivalent to the percentage of reflectance and
can also be used for reflectance experiments.
View Menu: Irradiance Mode
For relative irradiance measurements, a light source of known color temperature is needed as a
reference, for example the AvaLight-HAL with color temperature of 2900K. The relative radiance
energy at wavelength is then calculated using the current sample, the reference and the dark data
sets:
nn
nn
n
darkref
darksample
A log
nn
nn
n
darkref
darksample
T *100
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