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70 WFS Series
Note: Changing the camera resolution will also change the number of detectable
spots. In case you are working with a 'User Calibrated Reference' a new User
Calibration may be required.
Depending on the selected camera resolution in pixels the resolution of the
Wavefront Sensor, that is the number of the calculated microlens spots is also
defined thereby. The number of microlens spots in x and y direction are as follows:
WFS Camera
resolution in pixel
WFS10 Camera
resolution in pixel
WFS10-5C
WFS10-7AR
(150 µm pitch)
WFS10-5C
WFS10-7AR
(150 µm pitch)
The wavefront resolution is by the factor microlens pitch / pixel size lower than the
camera resolution. This means about 32x32 CCD pixels are mapped to one single
microlens (WFS150x). For WFS10 instruments with 150 µm lenslet pitch only about
15x15 CMOS pixels are mapped to one microlens.
Image Averages
Averages will reduce measurement noise which can be advantageous in case a low-
level light source has to be analyzed. An average setting higher than 1 will take
multiple images from the camera, average the pixel intensity pixel by pixel and output
an averaged image to the following evaluating routines. Due to reduced intensity
noise the accuracy of detected spot centroids is increased.
The available average settings are
9
5
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