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Development of NVD's Using XR5TM IIT Technique and III-V Photocathode Under Night Sky Conditions | ||
| Iraqi Journal of Applied Physics | ||
| Article 1, Volume 7, Issue 4, 2011, Pages 33-36 | ||
| Author | ||
| Q.A. Alnasar | ||
| Abstract | ||
| Image intensifier system (IIS) or night vision devices (NVD) are the imaging systems built up by using an image intensifier tube consisting of a photocathode, an anode in form of a phosphorous screen, and other optional components. Spectral sensitivity of the IIS depends on design but generally IIS used for external surveillance conditions are sensitive to radiation from (400 to 800) nm and sometimes up to 900nm. In this work the technical specifications of XR5TM image intensifier is used under different night sky conditions to evaluate the distance of vision for the NVD. Photocathodes have been developed using III-V materials with different concentrations; such materials have very high sensitivity in the near-infrared spectral region. The longest distance vision of (2120, 656) m can be obtained at full moon of 0.1 lux. | ||
| Keywords | ||
| Night Vision Devices; Photocathode; Image intensifier system | ||
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