Multiple beam steering using dynamic zone plates on a micro-mirror array

TL;DR

This paper demonstrates 3D laser beam steering using a DMD micro-mirror array with dynamically adjustable zone plates, enabling independent control of multiple focused spots without traditional optical components.

Contribution

It introduces a novel method of beam steering using dynamic zone plates on a micro-mirror array, eliminating the need for galvanometer mirrors and lenses.

Findings

Multiple focused spots can be generated and controlled independently.

Active beam control is achieved without additional optical components.

The method allows for flexible 3D laser beam positioning.

Abstract

Three dimensional laser beam steering 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 control can be realised without the need for a pair of galvanometer mirrors and a focusing lens. Writing multiple zone plate patterns to the DMD enables multiple focussed spots to be generated and controlled independently