Alignment; Alignment At 1550 Nm (Laser Measuring Wavelength); Alignment At 830 Nm (Pointer Wavelength) - Safran LRF 6742 Manual

LRF 6742 Integrator Manual

4.4 Alignment

The module components are boresighted in the factory. For this reason, the module can be mounted and
replaced easily with a tolerance of ± 1.5 mrad.
If higher precision is desired for a professional alignment, every individual module has to be aligned to the
host's optical axis individually.
For this procedure, we recommend the use of a collimator and a camera.
Collimators can be sourced from:
 Inframet
 Möller Wedel Optical
Vendors of 1'550 nm cameras (SWIR cameras) include:
 XenICs (e.g. XEVA-1.7-320)
 Sensors Unlimited (e.g. 640HS-1.7RT)
 Allied Vision Technologies (e.g. Goldeye P-008 SWIR)
 Raptor Photonics
4.4.1

Alignment at 1550 nm (laser measuring wavelength)

The LRF module provides a software command "Laser low power continuous" mode to make its line of sight visible to
SWIR cameras. This is especially useful during aligning the module to the host system.
4.4.2

Alignment at 830 nm (pointer wavelength)

LRF6742 LP contains a 830 nm pointer to make its line of sight visible to NIR cameras (also Night Vision
Systems and most CMOS cameras). These cameras are significantly cheaper than SWIR cameras and they
can be used to boresight of the module as well.
NOTICE
If the laser pointer is too strong for the camera, the use of filter attenuators is necessary. They can
be sourced, for example, from Schott (KG1, KG2, KG3 or KG5).
INTEGRATOR MANUAL LRF 6742 918574A
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Figure 5: Alignment Set-up with collimator and 1550 nm camera
Public: 04.2023
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