THORLABS WFS150, Руководство по эксплуатации

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84 WFS150 / WFS150C Manual
© <2007> ... Thorlabs GmbH
setting or enable automatic control of these camera parameters.
When this error occurs also for the lowest 'Exposure Time' and 'Gain' setting or if
'auto' is already enabled, the light intensity of the beam to be analyzed is too high
for the Wavefront Sensor. Decrease the power of your light source or insert an
attenuator in front of the Wavefront Sensor.
High ambient light level!
The captured camera image is overlayed a high amount of ambient light that
decreases the contrast between the spot peaks and the dark areas between.
Reduce the stray light by shielding its incident from the Wavefront Sensor or
increase the power of the analyzed beam.
Measurement stopped
This message is not an error or warning but will notice the user that the
continuous measurement has been stopped either by the user or due to
occurrence of an other error so that the displayed data and graphs do not indicate
actual wavefront data.
Graphics disabled
This warning is a reminder that all graphics and also the numerical parameter box
are disabled in order to speed up the sampling rate. Switch off the option 'Disable
Graphics' within the panel Menu
à
Setup
à
Wavefront Sensor
à
Miscellaneous
to enable the graphical and numerical outputs again.
Connection to instrument lost
An USB interface error is occurred by what the GUI lost the connection to the
Wavefront Sensor hardware. Check the USB cable and ensure that it is qualified
for high speed USB2.0 transmission. Then reconnect the USB cable and start the
Wavefront Sensor application again.
4.3.6
User Calibration
Besides the internal Wavefront Sensor calibration the user has the ability to
perform a wavefront calibration using his own setup and light sources. This can
increase the instruments accuracy.
A user calibration can be reasonable in case a wavefront should work as a
reference but already shows small distortions. In that case do the user wavefront
calibration and the distorted wavefront acts as a reference and is displayed as
ideal. Following measurements are based on this user reference and allow
accurate measurements of further wavefront distortions that come along with