Back-Up Solution; Nitrogen Flushing - Safran LRF 6019 Manual

LRF 6019 Integrator Manual
4.5.3

Back-up solution

If no other optical equipment is available, an alternative method can be
used to show the path of the invisible laser light. 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.
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 laser beam. However, this only works
when the card is quite close to the LRF module. To see the laser beam of LRF 6019 modules, the laser
viewing card must absorb light of 1550 nm wavelength (or 830 nm if the optional pointer is available).
Vendors of such cards are:

Laser2000 (www.laser2000.de) (e.g. QTX-Q42-T)

Thor Labs (www.thorlabs.de) (e.g. VCR4)

4.6 Nitrogen flushing

To avoid condensation or humidity in the optical system, the module is recommended to be operated in a
'dry' atmosphere inside a housing. A ventilation hole is provided in the metal bench holding the optics,
which is covered by small pieces of yellow tape. With respect to dust, the unit is recommended to be
handled observing standard practices for sensitive optical components and assembly procedures.
NOTICE
The yellow pieces of tape stop dust penetrating the optical system and shall be removed just
before the host system is sealed and purged.
914928_TML_LRF6019_en_Version C
Confidential & Proprietary  Safran Vectronix AG – All rights reserved
Figure 16: Positions of the ventilation holes
Figure 15: Boresighting
Public: 04.2019
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