Diffractive Line Beam Shaper
A diffractive laser beam shaper has been proposed as a lossless approach to transfer a Gaussian laser beam into a thin line beam with a uniform distribution along the line direction for scanning material processing or illumination application. With the consideration for the feasibility of fabrication, the optical performance of the diffractive beam shaper with its surface relief quantized at different levels has been analyzed with scalar diffraction theory, which shows that an 8 level solution is sufficient for keeping the uniformity in the line direction while the focusing function in the orthogonal dimension needs to be performed by an extra cylindrical lens.
Guo Fan JIN, Wing Bun LEE, Chi Fai CHEUNG and Suet TO
C. H. Chen et al., "Diffractive Line Beam Shaper", Key Engineering Materials, Vols. 364-366, pp. 254-258, 2008