FIELD: physics, optics.
SUBSTANCE: observation device comprises body with the first flat-parallel plate installed in it, at that the first plate is made of radiation-resistant optical glass, and the second flat-parallel plate installed additionally serially to the first plate, and the second plate is arranged as composite of flat-parallel plates made of carbon-bearing material with air gaps between them.
EFFECT: provision of specified protective properties of observation device relative to effect of gamma-neutron radiation with simultaneous provision of specified required optical parameters that determine observability from operator's place in process of observation via observation device.
5 cl, 4 dwg
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