Photon Focus MV1-D2048-3D06 series, Руководство пользователя

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8 Software
8.6 3D (Laser Line Detector) settings
This section describes how to the set the 3D properties. These properties are described in
Section 5.2.
1. Set threshold value for laser line with property
Peak0_Threshold
(in category
LineFinder/Peak
0) (see also note in Section 5.2.3).
2. Set scan area by setting the start row ( Peak0_3DY in category LineFinder/Peak0 ) and the
height ( Peak0_3DH in category LineFinder/Peak0 ) (see also Section 5.3.2).
3. Set threshold for laser line width calculation. Its value must not be smaller than
Peak0_Threshold
.
4. Set LineFinder_Mode (in category LineFinder ) to Mode_3Donly or to Mode_2Dand3D . Note that
Mode_3Donly should be selected for maximal frame rate.
5. If
LineFinder_Mode
is set to
Mode_2Dand3D
then skip steps 6 to 8 and continue at step 9.
6. The number of frames of the FrameCombine feature ( FrameCombine_NrOfFrames ) should be
set to a value that the resulting frame rate is below 200 for most applications (see also
Section 5.2.9). The resulting frame rate is the trigger rate divided by
FrameCombine_NrOfFrames . In free running mode ( TriggerMode = Off ) the frame rate can be
read from the property AcquisitionFrameRateMax (in category AcquisitionControl ). The
lower the resulting frame rate, the fewer interrupts are generated by the GigE driver and
the less load is produced on the computer’s CPU. E.g. if the trigger rate is 4000 fps then
FrameCombine_NrOfFrames
should be set to 20 or more.
7. If FrameCombine is used, then the parameter FrameCombine_Timeout (in microseconds)
should be set (see also Section 5.2.9. The value should be higher than the longest time
between triggers, e.g. if the trigger rate is constant, then it could be set to twice the time
between triggers.
8. If FrameCombine is used then
FrameCombine_Enable
should be set to
True
.
9. Read the value of the parameter HeightInterface and set Height to this value.
8.7 Column FPN Correction
Due to the readout structure of the image sensors there is a column-wise fixed pattern noise
(FPN). The Column FPN Correction (ColCorrection) adds or subtracts a fixed value to a column.
These values are obtained by a calibration process. The ColCorrection of the camera was
calibrated at Photonfocus production facility.
8.7.1 Enable / Disable the Column FPN Correction
The Column FPN Correction can be enabled or disabled with the property ColCorrection_Enable
(in category Correction / ColCorrection ). By default the correction is enabled.
8.7.2 Calibration of the Column FPN Correction
The Column FPN Correction of the camera is correctly calibrated at Photonfocus production
facility. Although a new calibration is normally not required, you can recalibrate the Column
FPN Correction with the following instructions:
1. Setup the camera to the mode where it will be usually used. (Exposure time, ...). The
width should be set to its maximal value. Due to the internal structure of the camera, best
performance of calibration will be achieved when calibrating under "real conditions".
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