An extremely useful property of the simulated detector object is that it
does not modify the field that is incident upon it. That is, if
another Optiscan object follows the DETECTOR object in the
Optiscan chain, the field incident on the next object WILL NOT
HAVE BE MODIFIED by the detector object. In this sense, the
detector object acts like the LOOK object in that it does not
affect the optical field. This is useful because it allows the
user to simulate a detector with more than one output. For
example, consider the following quadrant detector:
In this situation, a different current is detected from each of
the 4 detector elements that are illuminated.
This sort of detector can be simulated
in Optiscan by creating 4 separate detectors with the following
responsivity patterns:
Each of these detectors is set to generate a separate output file,
and is linked into the system as follows:
Because the DETECTOR object does not modify the field, these four
simulated detectors physically represent a quadrant detector.
