LiDAR/3D depth mapping systems using advanced swift FLC photonics (Conference Presentation)

Abhishek Kumar Srivastava

doi:10.1117/12.2653253

14 March 2023 LiDAR/3D depth mapping systems using advanced swift FLC photonics (Conference Presentation)

Abhishek Kumar Srivastava

Proceedings Volume PC12442, Emerging Liquid Crystal Technologies XVIII; PC1244206 (2023) https://doi.org/10.1117/12.2653253
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

In this talk, we will discuss the 3D depth mapping system using the Electrically Suppressed Helix Ferroelectric Liquid Crystal (ESHFLCs) Dammann grating. We used a photo-alignment approach to align the ESHFLC in patterns to create the Dammann grating profile. The ESHFLC Dammann grating projects an equal-intensity point array onto the scene from where we can extract the depth information from the scene. We achieved a cm-scale resolution using the proposed depth mapping system with a very high framerate >50k frames/s. The proposed ESHFLC Dammann grating replaces iterative scanning and enables LiDAR as a one-shot capturing system. The proposed device shows a fast-switching speed (approximately 5μs) with precise measurement of translational and rotational movement. Furthermore, low fabrication cost, lightweight, and small size make these devices suitable for modern Light Detection and Ranging (LiDAR)/3D depth mapping systems.

Conference Presentation

Citation Download Citation

Abhishek Kumar Srivastava "LiDAR/3D depth mapping systems using advanced swift FLC photonics (Conference Presentation)", Proc. SPIE PC12442, Emerging Liquid Crystal Technologies XVIII, PC1244206 (14 March 2023); https://doi.org/10.1117/12.2653253

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KEYWORDS

Photonics

Associative arrays

Ferroelectric LCDs

LIDAR

Electro optics

LCDs

Optical alignment

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