Patent ID: 9042423
Filing Date: 2015-05-26
Classification: G02B,H01S

Abstract:
1. An apparatus comprising: a plurality of laser diode emitters, each emitter for emitting a broad-area light beam in a beam direction, each beam having a fast axis transverse to the beam direction and a slow axis transverse to both the beam direction and the fast axis, each beam being broad in the slow axis and narrow in the fast axis; a group of optical components for each emitter for collimating, shaping, stacking and directing the beams along a light path towards a beam spot, each group aligned downstream on the beam direction of the group's associated emitter; and a lens feature aligned on the light path downstream of the groups of optical components and upstream of the beam spot, the lens feature having a fast axis focal length less than about 3 millimeters, wherein the lens feature is arranged to perform a fast-axis Fourier transform of the beams such that the edges of a fast axis near-field intensity distribution of the beams at the beam spot increase in steepness.