FIELD: measuring equipment.
SUBSTANCE: device has reflector, means for producing image and optical system for projecting image on display, as light source a board with light diodes is used, light flows of which are concentrated on an optical system. Protector is provided with sensor of outer light level and connected to common current adjuster.
EFFECT: broader range of use, higher precision, lower energy consumption.
2 cl, 16 dwg
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