FIELD: television engineering.
SUBSTANCE: device that can be used for supervision and checkup systems at in-situ illuminations over 100 000 lx, for instance to control welding processes of high-melting metals, has lens 1, power unit 3, two television signal sensors 2, 5, beam splitter 4, sync pulse selector 6, test line shaper 7, peak detector 8, comparator 9, and switching unit 10. Proposed device is characterized in that signal-to-noise ratio due to image blurring for in-situ illuminations of sections corresponding to new upper section of range is automatically maintained as a minimum at permissible level.
EFFECT: enlarged upper range of working illuminations and reduced power requirement of device.
3 cl, 7 dwg
