Holographic optical element for LIDAR scanning systems

Ashkan Arianpour; Graham Nelson; Tim Christianson; William Clifton

doi:10.1117/12.3001142

11 March 2024 Holographic optical element for LIDAR scanning systems

Ashkan Arianpour, Graham Nelson, Tim Christianson, William Clifton

Proceedings Volume 12893, Photonic Instrumentation Engineering XI; 1289304 (2024) https://doi.org/10.1117/12.3001142
Event: SPIE OPTO, 2024, San Francisco, California, United States

Abstract

Airborne LIDAR sensors can produce accurate 3D point clouds for terrain mapping at different altitudes. As the altitude increases, there is a need for larger aperture sizes to ensure the collection of sufficient photons and the preservation of spatial resolution. In the case of conical scanning optical systems, axially spinning refractive wedges can be used to cover a scan across the field of regard. Nevertheless, maintaining rotational balance for refractive wedges proves challenging, particularly at angles exceeding several degrees, due to their asymmetric moment of inertia. In contrast, a holographic optical element serves as an alternative scanning optic with a symmetric moment of inertia, effectively addressing stability concerns associated with substantial scan angles compared to refractive wedge-based scanners. Our study highlights that HOEs can accommodate a wide range of scan angles and aperture sizes without compromising volumetric constraints or stability, showcasing their effectiveness in optical scanning for LIDAR sensors.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Ashkan Arianpour, Graham Nelson, Tim Christianson, and William Clifton "Holographic optical element for LIDAR scanning systems", Proc. SPIE 12893, Photonic Instrumentation Engineering XI, 1289304 (11 March 2024); https://doi.org/10.1117/12.3001142

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