Investigation on an atmospheric pressure dielectric barrier discharge infrared image converter

摘要

In this paper the possibility is investigated to utilise an atmospheric pressure dielectric barrier glow discharge in nitrogen to convert infrared radiation to the visible spectral range (VIS). In principle, it belongs to the thermal detectors. The converter cell consists of a plan-parallel arrangement of electrodes. One electrode acts simultaneously as the infrared transparent window and the other electrode is performed transparency in the VIS to observe the discharge. The effect mainly depends on an increasing electron desorption rate from the dielectric surface by the infrared radiation, which involves a higher brightness of the discharge. In the investigation a working range was figured out from 1.5 mJ cm{sup}(-2) up to 0.6 J cm{sup}(-2) and the time of reaction is less than 1/100 s. One possible application is the analysis of the spatial intensity distribution of a carbon dioxide laser beam. The spatial resolution was identified to be at least 3 to 4 lines per millimeter.