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  Night vision devices

 Thermal imagers TV cameras Night vision devices Laser systems Boresight systems Multi-sensor systems Image intensifiers IR FPA sensors CCD/CMOS sensors Optical systems Discrete detectors Test services

Inframet offers several test station optimized for testing different groups of night vision devices:

  • NVT test station - a station optimized for testing surveillance night vision devices (devices of wide field of view usually from about 30deg) to about 50 deg,

  • NVS test station - a station optimized for testing night vision sights (devices of narrow field of view usually below 12 deg),

  • NVB test station - a station optimized for high speed boresighting of binocular night vision devices.

The NVT station is a test system optimised for  testing surveillance night vision devices. The station projects images of some standard targets into direction of tested night vision device  fixed on the upper wall  and looking down. Basically the tested NVD is "dropped" to its holder-without any clamping. Next,  the user can control light intensity and type of target to be projected using two knobs: Light (control of light intensity) and Target (control of type of target to be projected). The user can monitor the light level on the internal digital display. The tested NVD generates distorted copies of the projected standard images. Images generated by tested NVD are evaluated by human observer or  with help of some measuring tools (luminance probe) important parameters of night vision devices are determined. The station is built as an stand alone system to be used by a user who sits on a chair. 

Fig.1. Photo of NVT test station Fig.2. Block diagram of NVT test station

The NVS  station is a test system optimised for  testing night vision sights (night vision devices of narrow field of view and magnifications over three). Optionally surveillance mono/binocular night vision devices can be tested, too.  The station projects images of some standard targets into direction of tested night vision device.  The user can control light intensity and type of target to be projected using two knobs. The tested NVD generates distorted copies of the projected standard images. Images generated by tested NVD are evaluated by human observer or  with help of some measuring tools (luminance probe) important parameters of night vision devices are determined.

 
Fig.3. Photo of NVS test station Fig.4. Block diagram of NVS test station

Data sheet:

Comparison table

Parameters NVT NVS
Maximal aperture of tested NVD 30mm 120mm (150mm -option)
Configuration Vertical Horizontal
Design concept Compact, stand alone test station Modular test station of exchangeable collimators
Test range the same as in NVS the same as in NVT
Recommendation testing surveillance NVDs testing night vision sights

The NVB  station is a test system optimised for boresighting of binocular night vision goggles. Binocular night vision goggles enable stereoscopic vision and are used in high numbers as goggles of  pilots of helicopters, aircraft  or as goggles of drivers of mechanical carries during night operations.  When the two channels of binocular night vision goggles are not aligned properly the user shall see images of the observed scenery.  However due to discomfort of such observation  conditions (eye  balls  of the user are not in natural positions)  after some time quality of image perceived by human observer deteriorate or even the observer can experience headache. Such a situation significantly increases probability of accidents  and reduces safety of night operations carried out by military, paramilitary or civilian organisations.  The NVB test station enable its users to carry out operation of perfect aligning of channels of binocular night vision goggles  and to avoid the described earlier negative situation.  The test procedures used by the NVB   station are based on recommendations of the MIL series military standards.

Fig.3. Photo of NVB test station Fig.4. Block diagram of NVB test station

Data sheet:

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