FIELD: laser technology, possibly formation of beam of Nd : YAg lasers.
SUBSTANCE: laser for forming beam with divergence 10 - 20 mrad includes irradiator, mirror system, optical stabilizing system in optical axis of irradiator. In first variant of invention spacing between irradiator and optical stabilizing system and between optical stabilizing system and outlet of treatment zone is selected according to relation (0.8 -1.2) : (10 - 20). In second variant of invention optical stabilizing system includes three members, namely successively arranged along laser axis diverging biconcave lens and two diverging long-focus plano-convex lens. Relation of distances between biconcave and first plano-concave and between first plano-concave and second plano-concave lens is in range (1.2 -1.7) : (1.1 -1.6).
EFFECT: enhanced stability of geometry parameters of laser beam on treated surface, constant position of focal spot.
2 cl, 4 dwg
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