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  • Testing laser systems / Field tester of laser range finders
  • Testing laser systems / Field tester of laser range finders

LAS

Article: 00249822

Testing laser systems / Field tester of laser range finders

Tests of LRF done using LAS are typically done using two methods: 1) shooting to a reference target at variable distance, 2)shooting to a reference target at fixed distance through a medium or regulated transmission. In case of the first method, tested LRF is shoot into direction of a reference reflective target located at a distance that is gradually increased until LRF starts to fail to generate proper distance readout. In case of the second method the LRF is shoot into direction of a reference reflective target placed at some fixed distance (typically from about 0.5 to 1 km), attenuating radiation emitted by the LRF using VAM variable attenuator module or using EA external attenuators, and checking at what attenuation level the LRF stops giving proper distance indications. This way enables to measure Extinction Ratio parameter understood as an maximal attenuation (in dB) when tested LRF is still capable to work. In case of both methods targets of different size and reflectivity are used depending on technical specifications of tested LRFs. TEST CAPABILITIES
  • Direct tests of operational range
  • Measurement of ER at field conditions (final performance tests)
  • Boresight errors Recalibration of LTE/LTE test stations for testing LRFs at laboratory conditions (measurement of ER)
Tests at field conditions look apparently easy to be done using ad-hoc targets and optical attenuators. However, field tests that could generate repeatable, accurate results cannot be using improvised test stations. Professional test stations characterized by three important features:  1) Near perfect Lambertian diffusive coating on the reference target of precisely known reflectance, 2) A two channel attenuation system of large optical aperture and ultra high regulation dynamic (at least 40dB), 3) User-friendly equipment to be easily operated at field conditions) is needed. FEATURES:
  • Flexible, easily transportable reflective targets
  • Lambertian diffusive coating
  • Set of targets of different size and known reflectivity
  • Ultra high regulation dynamic of the attenuation system
  • User friendly method to regulate attenuation

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