Patent ID: 8599485
Filing Date: 2013-12-03
Classification: G02B,H01S

Abstract:
1. An apparatus for providing a light beam comprising: a) a solid-state laser that is energizable to emit, along an optical axis, an input laser light beam that has a first aspect ratio of etendue R b) a first cylindrical lens that is disposed to collimate the input laser light beam with respect to the first direction; c) a second cylindrical lens that is disposed to collimate the input laser light beam with respect to the second direction; d) a bisecting reflective surface having an edge that extends along the first direction and that is disposed along the optical axis to split the collimated laser light beam, with respect to the second direction, into an undeviated beam path from light on one side of the edge, and a first deviated beam path from light on the other side of the edge, wherein the undeviated and first deviated beam paths each contain emitted light from the solid-state laser; and e) a folding reflective surface disposed to redirect the first deviated beam path back toward the bisecting reflective surface, so that the redirected first deviated beam path is optically parallel with the undeviated beam path and is displaced from the undeviated beam path with respect to the first direction, wherein at least a first portion of the redirected first deviated beam path passes the edge and combines with the undeviated beam path to form an output beam having a second aspect ratio of etendue R