Patent ID: 8749888

Claim:
A device for producing laser radiation, the device comprising: a homogenizing device configured to separately homogenize a plurality of partial beams or a plurality of groups of partial beams of the laser radiation and to cause the partial beams or groups of partial beams emanating from said homogenizing device to each generate a line-shaped intensity distribution with steeply decreasing flanks at line ends, in a work plane; and a superposition device configured to superpose the partial beams or groups of partial beams, to permit the line-shaped intensity distribution to be generated in the work plane and to cause the intensity distribution to have a length greater than a length of each line-shaped intensity distribution of the partial beams or groups of partial beams; said superposition device including a lens array with a plurality of lenses and the following condition holds true for said lenses in said lens array: 2· F ·NA(50%)= M·P 2 with M= 1,2,3, . . . , F is the focal length of each lens, P 2 is the pitch of said lenses, and NA(50%) is the numerical aperture of each lens, defined by an angle at which the intensity of light passing through said lenses has fallen by half.