Method and apparatus to improve the homogeneity of an edge-light

A lighting device, comprising:

• at least one light source configured to output source light beams;
• and
• a light blade body including,
• an in-coupling portion optically proximate said at least one light source and configured to collect and guide said source light beams as first light beams generally in a first direction along a longitudinal axis;
• a propagating portion extending along said longitudinal axis between a proximal end and a distal end, said propagating portion being configured to receive said first light beams from said in-coupling portion at said proximal end, wherein said propagating portion includes mixing optics configured to increase dispersion and mixing of said first light beams to produce second, mixed light beams and to guide said second, mixed light beams to said distal end, wherein said propagating portion is a rectangular-shaped plate and includes a top surface and a bottom surface, said top surface and said bottom surface being opposite each other and parallel to said longitudinal axis, said mixing optics comprising a plurality of scallop-shaped convex features disposed in rows and columns along an entirety of said top surface and said bottom surface, wherein each of said scallop-shaped convex features include a curved apex facing toward an interior of said propagating portion;
• and
• an out-coupling surface joined to said distal end of said propagating portion and perpendicular to said longitudinal axis of said propagating portion and configured to receive said second, mixed light beams and to emit said second, mixed light beams in said first direction.