title: Quasi-Dammann grating with proportional intensity array spots.
abstract: A quasi-Dammann grating is proposed to generate array spots with proportional-intensity orders in the far field. To describe the performance of the grating, the uniformities of the array spots are redefined. A two-dimensional even-sampling encode scheme is adopted to design the quasi-Dammann grating. Numerical solutions of the binary-phase quasi-Dammann grating with proportional-intensity orders are given. The experimental results with a third-order quasi-Dammann grating, which has an intensity proportion of 3:2:1 from zero order to second order, are presented.
authors.affiliation: Laboratory for Laser Intelligent Manufacturing, Institute of Mechanics, Chinese Academy of Sciences, 15 Beisihuanxi Road, Beijing, China.
authors.forename: Shaoxia
authors.initials: S
authors.lastname: Li
authors.forename: Gang
authors.initials: G
authors.lastname: Yu
authors.forename: Caiyun
authors.initials: C
authors.lastname: Zheng
authors.forename: Qiaofeng
authors.initials: Q
authors.lastname: Tan