FIELD: metallurgy.
SUBSTANCE: video camera, in which by means of clamping ring it is fixed polaroid, it is installed in sleeve implemented with evenly spaced by its side face radial groove. Sleeve is installed in internal tube with ability of rotation around the lengthwise axis joint to video camera. The second polaroid and cover glass are mounted into the stationary fixture with formation between them closed cavity. In side inclined wall of fixture there are implemented long slots for blowdown gas transportation. Video camera is electrically connected to power box and video surveillance monitor.
EFFECT: ease and security of operator work, increasing of informativity, improvement of ability to treat the received information and veracity.
3 cl, 2 dwg
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