Two test stations are offered for testing laser systems (laser range finders, laser designators, laser illuminators, laser pointers):

1. LT test station for expanded testing of laser range finders and other laser systems,

2. LTF test station for final performance tests  of laser range finders.

The LT test system is a modular  measuring set that enables measurement of a long series of  parameters of laser range finders, laser designators,  laser illuminators, laser pointers. LTF station is a compact station  optimized for final performance tests of laser range finders (measurement of extinction ratio). LT test station uses electronic simulation of reflected beam; LTF test station used fiber optics to simulate reflected laser radiation.  

Fig. 1. Photo of the LT test station	Fig. 2. Block diagram  of the LT test station
Fig. 3. Photo of the LT test station	Fig. 4. Block diagram  of the LTF test station

LT test station:
General concept of testing laser range finders  using LT station is based on idea to collimate the emitted laser beam; disperse the beam; measure energetic, temporal and spatial parameters of the beam; and emit (with a regulated temporal delay) a new beam into the receiver module of the laser range finder.  Basically the LT test station is built from three main blocks: LT tester, PC (with frame grabber),  LAS software. The LT test system enables measurement of the following parameters of laser range finders:

1. pulse energy

2. pulse width

3. pulse frequency

4. beam divergence

5. receiver sensitivity

6. accuracy of distance measurement (single target)

7. accuracy of distance measurement (case of multiply reflections)

8. bore-sighting  of the laser emitter (in reference to optical axis of an internal optical sight, or external visible imager/thermal imager)

9. aligning of receiver (in reference to the emitter).  

Data sheets:

• LT test station 

LTF test station:

Final performance tests of laser range finders are typically done by shooting the LRF  into direction of a small target placed at some distance (typically about 0.5-1 km), attenuating radiation emitted by the LRF, and checking at what attenuation level  the LRF stops giving proper distance indications. In this way so called Extinction Ratio is measured.  LTF test station is a compact, mobile test station based on a concept of  a  test station that would imitate in laboratory/depot conditions  measurement of extinction ration ER of tested laser range finders without necessity of time consuming, costly field tests.

LTF test station enables performance tests of virtually all laser range finders. It particularly recommended for final users of laser range finders for demanding applications due to its simplicity of operation and capability of fast determination of real performance of tested laser range finders.

The LTF station is built from two  main blocks: LTF main block  and PC with software.  The LTF main block is built from external attenuator module, transmitter objective, transmitter target, receiver integrator, fiber optics,  attenuator, receiver integrator, and receiver objective.  The  transmitter objective focuses incoming laser radiation at plane of the transmitter  target  plate. The latter module  simulates the small reflector target used during ER measurement – only radiation that hits the target can be transmitted. The transmitter integrator converts incoming directional radiation into diffuse radiation.  The fiber optics transmits incoming radiation with some temporal delay. The attenuator attenuates incoming radiation in order to simulate attenuation by atmosphere at field conditions at regulated distance. The receiver  integrator converts incoming directional radiation into diffuse radiation. The task of the receiver target  is the same as the task of the transmitter target. Finally, the receiver optics emits collimated beam into direction of receiver of the tested LRF a directional beam that simulates radiation reflected by a target  irradiated by tested LRF.

Data sheets:

• LTF test station 

In case of questions please contact us: info@inframet.com