OPHIR vega User Manual page 59

To enter the needle screen do as follows:
1. From the main power or energy screen press
"Menu", select "Needle" and enter.
2. To use the expanded needle feature, press
"Expand".
3. To reset the minimum, maximum, and needle
tracking, press "Reset".
4. To change measurement settings, go back to the
reduced needle screen by pressing "Return"
Figure 4.10 Needle Screens with a photodiode sensor
Other Types of Sensors:
The functions described in the sections above can be
used with photodiode and pyrolectric detectors as well.
4.6.5. Position and Size
Some thermopile sensors are capable of Position and
Size measurement of laser beams. For a full description,
please see Chapter 7 BeamTrack Features
58