Beam Steering Technologies for Optical Systems
Summary
Beam steering underpins a broad spectrum of optical applications, from autonomous navigation and free-space communications to advanced microscopy and astronomical instrumentation. Technologies span mechanical scanners—such as galvanometric mirrors, polygon scanners and rotating prism pairs—to solid-state solutions including acousto-optic deflectors, liquid-crystal spatial light modulators and optical phased arrays. Mechanical systems offer large deflection angles and high optical throughput but can be bulky and subject to inertia-induced limitations, whereas acousto-optic devices achieve rapid, inertia-free scanning at the expense of optical bandwidth and diffraction efficiency. Liquid-crystal and phased-array approaches promise compact, low-power beam control with potential for electronic reconfiguration, yet they face challenges in steering range, insertion loss and fabrication complexity. Emerging metasurface and micro-electromechanical systems (MEMS) mirror arrays seek to combine wide angular coverage with miniaturisation, enabling foveated imaging, adaptive optics correction and dynamic light shaping on chip-scale platforms. Across all modalities, accurate control algorithms and calibration of system nonlinearities remain critical for achieving diffraction-limited pointing precision, minimising scan artefacts and integrating beam steering into turnkey optical systems.
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Beam Steering Technologies for Optical Systems publication trend
The graph below shows the total number of articles in beam steering technologies for optical systems across all publications each year (not limited to Nature Index journals).
Technical terms
Beam steering: the controlled deflection of an optical beam’s propagation direction to target or scan an angular region.
Risley prism: a pair (or trio) of rotating prisms whose relative angles determine the emergent beam deflection.
Field of view: the angular extent over which an optical system can image or direct a beam.
Super-resolution: techniques that enhance imaging resolution beyond the classical diffraction limit.
Inverse problem: the computational task of determining actuator settings required to achieve a desired beam direction.
References
- Super-Resolution and Wide-Field-of-View Imaging Based on Large-Angle Deflection with Risley Prisms. Sensors (2023).
- Multi-target free-space laser communication system based on a rotating double prism with an RF signal beacon.. Optics Express (2022).
- Geometric Method: A Novel, Fast and Accurate Solution for the Inverse Problem in Risley Prisms. Applied Sciences (2022).
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