4.4.3 Alignment without camera: Back-up solution
If no other optical equipment is available, an alternative method can be used to boresight
the module. Place a vertical and horizontal small pole (approx. 10 cm of width) at about 200
meters distance. Start with one orientation (horizontal or vertical) and measure until the
laser hits the pole and gives the correct distance back. You can then center the laser to this
first orientation and then do the same with the second orientation. With this method you can
align the laser to any equipment, however its more time consuming and not as precise as
with a camera.
4.4.1 Quick alignment with laser-viewing card
A quick and easy tool to make laser light visible are laser-viewing cards. These cards have a
photosensitive area, which emits a visible spot at the location of the invisible laser beam. They are very
useful for quick tests in the laboratory, but we do not recommend these cards for serial production.
Vendors of such cards are:
Laser2000 (e.g. QTX-Q42-T)
Thorlabs (e.g. VCR4)
4.5 Nitrogen flushing
To avoid condensation or humidity in the optical system, the module needs to be operated in a ‘dry’
atmosphere inside a housing. Ventilation holes are provided in the metal bench, which are covered by small
pieces of yellow tape. Concerning dust, we recommend to observe the standard practices for sensitive
optical components and assembly procedures.
NOTICE
The yellow pieces of tape stop dust penetrating into the optical system and they should be
removed just before the host system is sealed and purged.
To Next Page
Loading...
Need help?
General
