THORLABS M2MS, Operating Manual

Page: 35 / 167

BP209 Series 6 The Graphics User Interface (GUI)
Rev: 8.1, 14-Feb-2022 © 2022 Thorlabs Page 33
6.5.4.1 Calculation Area
The Calculation Area defines a specific area within
the full Region of Interest (ROI). Whereas the ROI
is the entire image area that is retrieved from the
BP209 Series and displayed, the Calculation Area
can be equal to or smaller than the ROI and defines
the reconstruction area that is used for all numerical
calculations.
Limiting the calculation area is advantageous partic-
ularly for
·
Selecting and analyzing only a single beam spot
among multiple beams
·
Rejecting ambient or stray light
·
Reducing measurement noise
Three presets are provided to chose a Calculation
Area:
Auto Rectangle: The software will analyze every image from the BP209 Series automati-
cally and determine the area in which a measurable amount of power is
present. Areas with a power level lower than the
clip level will be ex-
cluded from further calculations.
Full ROI: The entire image area defined by the ROI is involved in beam calcula-
tions.
User Rectangle: A rectangular area, set by user input is defined as Calculation Area.
Enter pixel values which describe the Calculation Area position and
size or simply drag a rectangle into the 2D Reconstruction window.
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