FEASA LED ANALYSER
FUNCTIONAL VERSION
Photopic Response
For everyday light levels, the photopic luminosity function best approximates the response of
the human eye. The photopic curve is the CIE standard curve used in the CIE 1931 color
space.
Figure 3c
The Led Analyser is shipped from the factory in this mode. This corrects the Absolute Intensity
to reproduce the photometric response (for lm, mcd). This can be verified by typing the
command getphotopic with the answer 1. The Analyser can be set in this mode by using the
command setphotopic1.
The photopic mode can be set for a radiometric response by sending the command
setphotopic2. This corrects the Absolute Intensity to reproduce the radiometric response (for
mW). This can be verified by typing the command getphotopic with the answer 2.
Figure 3d.
The user also has the option to turn the photopic response off setphotopic0. With the Analyser
in this mode there is no effect on Absolute Intensity. This can be verified by typing the
command getphotopic with the answer 0. This command is only available on Software
Rev F210 upwards
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