LIGHTING DEVICE WITH LASER DIODES LINE Russian patent published in 2018 - IPC G02B27/09 G02B27/30 

FIELD: optics.

SUBSTANCE: lighting device (1) comprises a number of laser diodes (100) with several emitters (101, 102, 103) located in the first direction adjacent to each other with the possibility of partial beams (10, 11, 12) emission during operation; fast axis collimator (2); beam conversion means (3) located behind the fast axis collimator (2) in the beam propagation direction and configured to rotate the partial beams (10, 11, 12) by 90º during their passage through the said means and the prisms array (4), which is located behind the beam conversion means (3) in the beam propagation direction and includes plurality of prisms (40, 40') corresponding to the number of emitters (101, 102, 103). Prisms (40') input (400') and / or output (401') light areas, through which the partial beams (12) are passing, having the height offset before the beam rotation is indicated by the beam conversion means (3), are made so that to correct the Poynting vector error by means of the said partial beams (12) parallelizing, where the Poynting vector error (mrad) = height error (mcm) / focal length (mm) of the fast axis collimator (2). Prisms (40') output light surfaces (401'), through which the partial beams (12) are passing, having height offset before the beam is rotated by the said beam conversion means (3), in the first direction are made wedge-shaped. Prisms (40), through which the partial beams (10, 11) are passing, which emitters (101, 102) do not have the height offset, have mutually nonparallel input (400) and output (401) light surfaces.

EFFECT: invention allows to compensate for the emitters distortions.

7 cl, 3 dwg