OPHIR vega User Manual page 19

Laser power/energy meter
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5. Select "Average" to select the average over period
or select the default, "NONE".
6. If this sensor has a diffuser sensor, set Diffuser to IN
or OUT.
7. Now select "Max Pulse Len" and choose the
shortest pulse length setting longer than your laser's
pulse length. Warning: Incorrect readings will result
if pulse length is not set up correctly.
8. Select "Laser" and select the laser type you wish to
be the default.
9. Press "Save" to save all present settings then "Exit" to
get back to the main measurement screen.
Note:
Some sensors have only the one pulse length setting
for all pulse lengths. In that case N/A appears. For
further details on configuration see Sections 6.2 and
6.3.
2.5.5. Energy or Average Power Measurement
Warning:
Do not exceed maximum sensor limits for power,
energy, power density and energy density as listed in
Table 5. and Table 6. in Chapter 10. Otherwise, there
is a risk of damaging the absorber.
With the pyroelectric sensor, you have been supplied a
test slide with the same coating as on your pyroelectric
detector. You can also obtain this slide from your dealer.
You should use this slide to test the damage threshold
with
your
then either enlarge your beam or lower the laser energy
until damage is no longer seen.
Note:
High sensitivity pyroelectric sensors (PE-9, PE-10) are
very sensitive to vibration, and therefore might read a
false trigger when operating in an acoustically non-
stable environment. Set the threshold to a high
enough value that false triggering does not occur.
Ophir also offers a shock absorbing mounting post
laser
pulses. If the slide shows damage,
18

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