Patent ID: 6377410
Filing Date: 2002-04-23
Classification: G02B,H01S

Abstract:
An apparatus for beam shaping of laser diode array, comprising:at least one laser diode array having an emitting surface, the emitting surface being substantially more elongated, in a slow axis than in a fast axis which is perpendicular to the slow axis; beam dividing/rearranging means, comprising: at least one prism group comprising a plurality of adjacent stacked prisms with lateral edges being altitudes of the prisms, the adjacent stacked prisms having predetermined uniform offsets between the adjacent stacked prisms, the beams from said laser diode array entering the prism group from one stacked side and divided into a plurality of sections of beams along the slow axis and the sections of beams are displaced along their fast axis and overlie one another whereby the Lagrange invariant of a resulting beam is increased approximately by n-fold in the fast axis and reduced approximately by n-fold in slow axis.