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Atom series - v160120
Kvant Lasers s.r.o.
EN
Each eect (picture) contains a dierent number of graphical points which defines the actual shape of the eect. The more
points an eect contains, the lower the maximum scan rate will be in relation to the scanning angle.
As an example we’ll work with the star eect shown below and with the parameters of quality scanning system:
Let’s say the star eect is made of 300 graphical points (including non-visible blanking points) and we know that the
maximal scan-rate of our scanning system is 35kpps @ 8 degrees (= 35.000 points per second at 8 degrees projection
angle). We also know that we display the star 35 times per second which is a default frame rate of the control software
we are using.
So we need to display 300 points 35 times per second = 10.500 pps. This means that we could display 3 of these
stars beside each other within one single laser eect and that it would be quite close to the scanner limit (3 × 10.500
= 31.500pps). This however applies ONLY if the scanning angle is not more than 8 degrees on both axes! If we start to
increase the size of the projection (scanning angle) it is necessary to either lower the number of points within the eect
or drop down the scan-rate in the control software (FPS) to a safe level – which may result in flicker.
From the example above we can also determine how many points this scanning system is able to project if the scanning
angle is not more than 8 degrees:
35.000 points / 35 Frames Per Second = 1.000 pps. This is the absolute maximum of how many points we should be using
when programming an eect if the scanning angle is not more than 8 degrees.
In the following pictures you see the same star eect scanned at dierent scan rates at full scanning angle (60 degrees).
Picture 1: the scan rate and/or number of points is too low. The corner points are more visible than the lines between them
and the whole eect flickers. The scan-rate and/or number of points needs to be increased.
Picture 2: the scan-rate and/or number of points is about right. The whole eect has more or less the same intensity and
does not flicker.
Picture 3: further increasing of the scan-rate and/or number of points results in the eect starting to distort, firstly around
corners only. This indicates that you are exceeding the maximal scan rate of the scanning system! If you operate the
scanning system at scan-rates higher than the maximum scan-rate of the scanning system the scanners will get damaged
irreversibly due to overheated coils damaging rotor magnets.
How to establish correct Scan-rate and maximal number of points in an eect
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