High brightness diode output methods and devices
Devices and methods for maintaining the brightness of laser emitter bar outputs having multiple emitters for coupling and other applications. In some embodiments, at least one brightness enhancement optic may be used in combination with a beam reformatting optic.
1. A brightness enhancement optic, comprising a cylindrical telescope array including a plurality of opposed aligned pairs of parallel cylindrical lenses disposed parallel and next to each other and including a lensing configuration superimposed on output lenses of the opposed aligned pairs of cylindrical lenses, and wherein a first cylindrical lens of each opposed aligned pair of parallel cylindrical lenses is concave and a second lens of each opposed pair is convex.
2. A brightness enhancement optic, comprising:
a faceted telescope configuration including:
an input surface including a plurality of adjacent input facets, the adjacent input faces lying on a first radius; and
an output surface including a plurality of adjacent output facets lying on a second radius with each output facet corresponding to a respective input facet and wherein the respective input and output facets are substantially parallel to each other and are configured to refract substantially parallel input beams through the optic such that the substantially parallel input beams exit the output facets parallel to each other and spaced closer together than a spacing of the parallel input beams.
3. The optic of claim 2 wherein each corresponding input facet and output facet pair includes a pair of corresponding cylindrical lenses on the input and output facet surfaces.
4. The optic of claim 3 wherein the input facet and output facet pairs comprise a power of about 0.5 to about 1.5.
5. The optic of claim 4 wherein the input facet and output facet pairs comprise a power of about 1.