Abstract

Spot arrays beyond the diffraction limit are required in many optical applications, and the shaping of a light beam into subdiffraction spot arrays can be implemented by diffractive optical elements (DOEs). However, the low light efficiency of spot arrays is undesired in many applications. In this paper, a modified Gerchberg—Saxton algorithm is presented for generating DOEs to realize subdiffraction spot arrays with higher light efficiency. In the simulation, the spot size is reduced to approximately 70%–90% of the diffraction-limited spot, and the corresponding light efficiency is within the range of 20% to 50%. The experimental results are also shown to demonstrate the effectiveness of the proposed algorithm.

© 2017 Optical Society of America

Design and demonstration of fan-out elements generating an array of subdiffraction spots

Yusuke Ogura, Masahiko Aino, and Jun Tanida
Opt. Express 22(21) 25196-25207 (2014)

Diffractive fan-out elements for wavelength-multiplexing subdiffraction-limit spot generation in three dimensions

Yusuke Ogura, Masahiko Aino, and Jun Tanida
Appl. Opt. 55(23) 6371-6380 (2016)

Periodic diffractive optical element for high-density and large-scale spot array structured light projection

Yanbo Zhao and Qiaofeng Tan
Appl. Opt. 62(31) 8279-8285 (2023)

Precise design of two-dimensional diffractive optical elements for beam shaping

Weidong Qu, Huarong Gu, Qiaofeng Tan, and Guofan Jin
Appl. Opt. 54(21) 6521-6525 (2015)

Design of two-dimensional diffractive optical elements for beam shaping of multicolor light-emitting diodes

Huarong Gu, Mengzhu Chen, Qixia Wang, and Qiaofeng Tan
Appl. Opt. 57(10) 2653-2658 (2018)