FIELD: physics.
SUBSTANCE: system has a light filter, a power regulator which facilitates supply of energy to an instrument in response to the control signal for switching on the instrument, and a control unit. The light filter has a filter with an electrically controlled spectral characteristic, capable of changing light transmission from antireflection to darkened state in response to the control signal for switching the light filter to the darkened state. The control unit generates a control signal for switching the light filter to darkened state in response to a signal for switching on the instrument. The light filter generates a signal for confirming switching of the light filter to darkened state, and the control unit generates a control signal for switching on the instrument in response to the signal for confirming switching of the light filter to darkened state.
EFFECT: high reliability and reduced requirements for light filter switching time.
18 cl, 8 dwg
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