US 12,339,464 B2
Apparatus for forming line beam
Akifumi Sangu, Yongin-si (KR); Jekil Ryu, Yongin-si (KR); Cheolho Park, Yongin-si (KR); Haesook Lee, Yongin-si (KR); Youngsu Chae, Yongin-si (KR); and Gyoowan Han, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Nov. 9, 2020, as Appl. No. 17/092,669.
Claims priority of application No. 10-2020-0049483 (KR), filed on Apr. 23, 2020.
Prior Publication US 2021/0333564 A1, Oct. 28, 2021
Int. Cl. G02B 27/09 (2006.01); B23K 26/06 (2014.01); B23K 26/067 (2006.01); B23K 26/073 (2006.01); H01S 3/00 (2006.01)
CPC G02B 27/0927 (2013.01) [B23K 26/0648 (2013.01); B23K 26/0676 (2013.01); B23K 26/0738 (2013.01); H01S 3/0071 (2013.01); H01S 3/0085 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An apparatus for forming a line beam, the apparatus comprising:
a laser source configured to generate input light;
a telescope unit configured to magnify the input light in an X-axis direction perpendicular to an optical axis to produce magnified light, wherein the optical axis comprises a progression direction of the input light;
a beam-transforming unit configured to divide the magnified light from the telescope unit into a plurality of sub-columns;
a Fourier unit configured to uniformly mix the plurality of sub-columns to produce mixed light;
a long-axis optical unit configured to uniformly disperse the mixed light from the Fourier unit in the X-axis direction to produce dispersed light; and
a short-axis optical unit configured to focus the dispersed light from the long-axis optical unit onto a reference plane,
wherein the long-axis optical unit includes a pair of cylindrical lens arrays, a first cylindrical convex lens, and a second cylindrical convex lens in a linear arrangement with a same optical axis, wherein the pair of cylindrical lens arrays, the first cylindrical convex lens, and the second cylindrical convex lens are located before the short-axis optical unit in a travelling direction of the dispersed light,
wherein the short-axis optical unit includes a concave reflective surface, and wherein a curvature of the reflective surface is constant in the X-axis direction, and wherein the short-axis optical unit is rotatable with respect to an axis parallel to the X-axis direction.