LRF 3013 Integrator Manual
Document number: TML 913655 ver A
Confidential & Proprietary Safran Vectronix AG – All rights reserved
50 m 500 m 3000 m2000 m1000 m100 m
NATO (2.3x2.3m )
Man (1x1 m)
Laser beam
Figure 5.: Example of a 1 mrad laser beam size on target
Object Albedo
The albedo is the surface's reflectivity of an object, or rather is the ratio of reflected to incident light in the
wavelength of the LRF Module (1550 nm).
-> An object with a high albedo reflects more laser radiation and allows longer range performance. High
albedos on very short distances and low albedos on very long distances can either cause the LRF Module
to provide an invalid range measurement or is unable to find a target.
Object Orientation
The angle of the target in relation to the laser beam is also important. Similarly, targets with a very high
albedo can give only a very small reflection towards the LRF module when the reflected laser radiation is
not at 90° and reflected away, e.g. on water or pitched roofs.
-> 90° is optimal.
Object Hardness
The accuracy of “soft objects” like snow, smoke, clouds etc. depends on the condition of the object itself.
-> Hard objects allow a longer range and higher accuracy.
Mirror-like objects
The accuracy and range performance on mirror-like objects like water, glass surfaces or reflective traffic
signs can cause incorrect measurements or no measurement results at all.
-> Avoid mirror-like surfaces and aim at a target next to it.
Kinetic tremor
If the host system with an integrated LRF module is firmly installed or mounted (e.g. on a Tripod), longer
distances can be measured more easily. If the LRF module is shaking during a measurement, it can lead
to wrong or no measurement results. This is due to the fact that only a few pulses hit the target during the
measurement. The example below shows a laser beam with 1mrad divergence on targets in 1km
distance. The range measurement on the large NATO target is still OK, on the man size target it is lost.
-> Firmly mounted modules allow a longer range, e.g. on tripod.
NATO size (2.3x2.3 m)
Man size (1x1 m)
Laser beam
Figure 6.: Laser beam (1 mrad) on target (1’000 m) with kinetic tremor
To Next Page
Loading...
Need help?
General
