Multiple beam steering using dynamic zone plates on a micromirror array


Three dimensional laser beam steering of focal position has been demonstrated using a single optical device – a DMD micro-mirror array. Laser beam focus position is controlled using dynamically adjustable zone plates. These zone plates take the form of elliptical Fresnel zone plates or other variations such as binary Gabor zone plates. Active beam pointing and control can be realised without the need for a pair of galvanometer mirrors and a focusing lens. Focussing efficiencies into an off-axis diffraction order of a few percent are typically seen and continuity between neighbouring orders increase the effective field of regard. Writing multiple zone plate patterns to the DMD enables multiple focussed spots to be generated and controlled independently.

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Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Copyright 2018 SPIE. One print or electronic copy may be made for personal use only. Systematic reproduction, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Publication ISSN: 1560-2303
Last Modified: 08 Jan 2024 08:48
Date Deposited: 08 Aug 2018 13:05
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Related URLs: https://www.spi ... 3109.full?SSO=1 (Publisher URL)
PURE Output Type: Article
Published Date: 2018-07-27
Accepted Date: 2018-07-05
Authors: Benton, David (ORCID Profile 0000-0003-0663-1404)



Version: Accepted Version

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