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Optica Publishing Group
  • Current Optics and Photonics
  • Vol. 5,
  • Issue 5,
  • pp. 506-513
  • (2021)

Diffractive Optical Element for Noise-reduced Beam Shaping of Multi-array Point Light Source

Open Access Open Access

Abstract

An arrayed diffractive optical element design for the beam-shaping of a multi-array light source is proposed. This is an essential device for recent optical security and face recognition applications. In practice, we devise a DC noise reduction technique featuring high fabrication error tolerance regarding the multi-array light source diffractive optical elements, as a necessary part of the proposed design method. The spherical diverging illumination leads to DC-conjugate noise spreading. The main idea is tested experimentally, and the multi-array light source diffraction pattern is investigated numerically.

© 2021 Optical Society of Korea

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