title: Varied line spacing plane holographic grating recorded by using uniform line spacing plane gratings.
abstract: Uniform line spacing plane gratings are introduced into a recording system to generate aspherical wavefronts for recording varied line spacing plane holographic gratings. Analytical expressions of groove parameters are derived to the fourth order. A ray-tracing validation algorithm is provided based on Fermat's principle and a local search method. The recording parameters are optimized to record a varied line spacing plane holographic grating with the aid of derived analytical expressions. A design example demonstrates the exactness of the analytical expressions and the superiority of recording optics with auxiliary gratings.
authors.affiliation: Automation Department, University of Science and Technology of China, China. qingling@mail.ustc.edu.cn
authors.forename: Ling
authors.initials: L
authors.lastname: Qing
authors.forename: Wu
authors.initials: W
authors.lastname: Gang
authors.forename: Liu
authors.initials: L
authors.lastname: Bin
authors.forename: Wang
authors.initials: W
authors.lastname: Qiuping