THORLABS WFS150, Operation Manual

Page: 74 / 123

72 WFS150 / WFS150C Manual
© <2007> ... Thorlabs GmbH
Set Default
Click on 'Set Default' to activate the factory default values:
·
Circular pupil
·
Use Beam Width = disabled
·
manual Pupil Diameter = 3 mm
· Use Beam Centroid = enabled
· Limit to Pupil Interior = disabled
4.3.3.3
Wavefront Setup
The ' Wavefront ' setup panel contains essential items which determine wavefront
measurement and normalization of displayed data.
To open the setup panel you can use the Menu
à
Setup
à
Wavefront Sensor
entry or simply click right on one of the graphs on the right hand side of the main
panel. Select the tab ' Wavefront '.
Wavefront Reference
The Thorlabs Wavefront Sensors WFS150 / WFS150C are factory calibrated and
provide an internal reference for the measured spotfield centroids. This internal
reference is based on the well known and highly accurate parameters
· pixel distance of the CCD sensor = 4.65 µm
· lenslet pitch of the microlens array = 150 µm
· calibrated out-of-center shifts in for a plane wavefront under vertical incidence
· negligible torsion between CCD chip end lenslet array
This means, the centroid positions for all spots created by the lenslet array are