Patent ID: 8395844

Claim:
A laser apparatus for producing a linear intensity distribution ( 4 ) in a work plane, comprising a plurality of laser modules ( 1 ) emitting laser light, and also optical means ( 2 ) which, in each case, shape the laser light emerging from one of the laser modules ( 1 ) in such a way that the laser light ( 3 ) from the individual laser modules ( 1 ) is superimposed in the work plane to form a linear intensity distribution ( 4 ), wherein the optical means ( 2 ) comprise at least two homogenizing light apparatuses, each of said apparatuses for homogenizing light including a lens array ( 5 , 7 , 8 ) with a plurality of lenses ( 6 , 9 , 10 ) through which the light to be homogenized passes, wherein at least two different center-to-center distances of the lenses ( 6 , 9 , 10 ) of the lens array ( 5 , 7 , 8 ) are provided, and wherein the center-to-center distances of the lenses ( 6 , 9 , 10 ) decrease or increase from the inside to the outside, in such a way that each of said apparatuses for homogenizing light produces a trapezoidal angular distribution, wherein due to the constant gradients of the edges of the trapezoidal angular distributions the laser light ( 3 ) from the individual laser modules ( 1 ) are optimally superimposed in the work plane to form a linear intensity distribution ( 4 ).