FIELD: visual aids of navigation equipment. SUBSTANCE: heater that has radiation source placed in case and isolated from environment by means of transparent envelope connected to ground and also has contacts is characterized in that its radiation source is made in the form of probe with semiconductor chips arranged over its circumference, that transparent envelope is closed on top with cover, and that case is provided with holes for passing current conductors. EFFECT: reduced time lag and improved reliability. 2 dwg
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Authors
Dates
1998-05-20—Published
1996-07-16—Filed