Apr-09
73
Avantes
www.avantes.com
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:
n
n
n
n
n
dark
ref
dark
sample
A
log
n
n
n
n
n
dark
ref
dark
sample
T
*
100
