COLLIMATING OPTICAL SYSTEM FOR SEMICONDUCTOR LASER Russian patent published in 2013 - IPC G02B27/30 G02B27/09 

FIELD: physics.

SUBSTANCE: collimating optical system has a lens and two rectangular prisms arranged in series on a beam path. The edges of the refracting dihedral angles of the prisms are directed perpendicular to the plane of the semiconductor junction. The refracting angles of the prism are the same and are selected in the range of 20…42°, α is the angle of incidence of radiation beams on the prism and β is the refracting angles of the prism, selected based on the relationship: where n is the refraction index of the material of the prism. The focal distance of the lens F is selected based on the relationship where φ is the required radiation divergence; a_|| is the size of the emitting region of the semiconductor laser in a plane which is parallel to the plane of the semiconductor junction.

EFFECT: reduced size of optical-electronic devices using semiconductor laser radiation while preserving quality.

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