Diffractive Line Beam Shaper

Abstract

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.

Studies on Ni-Mo-P Coatings by Electroless Deposition

“…It indicates that the hardness variation of the Ni-Mo-P deposit is little but that of the Ni-P alloy is large after annealing. The great increase in hardness of the Ni-P alloy results from the formation of an intermetallic, Ni 3 P phase, in the deposit [16]. The Ni 3 P intermetallic precipitates have an ordered structure, therefore, the hardness of Ni-P deposit enhances substantially after annealing.…”