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Other optical measurement instruments

INFRAMET

  • Boresight systems / Portable stations for boresighting multi-sensor systems

JTAR

Article: 00249828

Boresight systems / Portable stations for boresighting multi-sensor systems

JTAR station is designed using a boresight concept totally different comparing to classical boresight system based on image projector located at very short distance to tested system and well aligned to the tested system. JTAR station is a based on a concept a portable station located at significant distance from the tested system that is used as a shooting target to laser of the tested system. The target is visible for both imagers (thermal imager and VIS-NIR camera) to enable measurement of boresight error between the imaging sensors. Next, its electronics can detect position of center of laser beam to enable measurement of boresight error between imagers and transmitter of LRF. Finally, a radio block being a part of JTAR enables communication with test crew that operates tested multi-sensor system and gets immediately information on measured boresight errors. Specialized design optimized for boresight of precisely defined type of multi-sensor system (wavelength/peak power, divergence angle of LRF, and FOV, resolution, optics size and locations of imaging sensors) is the only drawback of JTAR station comparing to quasi universal boresight station of JT/JIMS type. Measurement/checking of: 1. Alignment error for a thermal imager working in different FOVs, 2. Alignment error for VIS-NIR camera working in different position of zoom objective, 3. Alignment error between optical axis of VIS-NIR camera and a thermal imager, 4. Alignment error between transmitter of LRF and VIS-NIR camera, 5. Alignment error between transmitter of LRF and thermal imager. FEATURES
  • Perfect tool to check boresight of multi-sensor imaging/laser systems at field conditions before important missions (Yes/No tests) or as maintenance tester
  • Tests are to be done when JTAR station is located at distance from about 50m to about 500m depending on specifications of divergence angle of transmitter of LRF
  • No limitations on optical aperture of optics of sensors of tested multi sensor system
  • The station is packed in a large suitcase and easily transported to any location
  • Possible to test thermal imagers from some distance (no necessity to remove imager from a helicopter to test it)
JTAR station is typically designed for boresight of multi sensor imaging/laser system of following features: • Blocks of tested system: thermal imager, VIS-NIR camera, laser range finder • Type of LRF: monopulse (emitting high power pulses of peak power over 0.5mJ) • Wavelength of LRF: 1064nm, 1530nm, 1540nm, 1570nm • Divergence angle of LRF: not higher than 2 mrad • NETD of tested imager: not higher than 100mK • Sensitivity of VIS-NIR cameras: not higher than 1lx. However, JTAR can be optionally delivered in versions capable to test systems of different configurations.

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