title: One exposure processing to fabricate spiral phase plate with continuous surface.
abstract: An economical method for fabricating spiral phase plate (SPP) with continuous surface is proposed in this paper. We use an interval to quantize a three dimensional surface of an SPP into two dimensional bars to form a binary mask. The exposure dose can be precisely distributed through this mask in the exposure process. We discuss the select criterion of the quantization interval and the fabricating processes of SPP in detail. In the results, we present the fabrication of four kinds of high quality SPPs with different topological charges. The morphology analysis and the corresponding optical measurements verify the reliability of our fabrication method.
authors.forename: Lifang
authors.initials: L
authors.lastname: Shi
authors.forename: Zhiyou
authors.initials: Z
authors.lastname: Zhang
authors.forename: Axiu
authors.initials: A
authors.lastname: Cao
authors.forename: Xue
authors.initials: X
authors.lastname: Luo
authors.forename: Qiling
authors.initials: Q
authors.lastname: Deng