FIELD: optical instruments. SUBSTANCE: device has at least two optical members, which contain embedded optical systems. External walls of members are located in housings. In addition device has adjustment units, which are designed for mounting end part of each optical member in them and for adjustment of optical systems of optical members. Laser beam sources are located on both sides of housings. Laser beams do not focus on external surface of housings. Lead supply units are located on respective upper ends of both laser beam sources and provide lead into laser beams. In addition device has controller which controls operations of laser beam source and lead supply units. EFFECT: prevention of moisture access inside optical member due to complete sealing of gap and minimal alteration of properties of optical members. 18 cl, 6 dwg
