Exploiting wavelength diversity for high resolution time-of-flight 3D imaging

2020/10/14 by Fengqiang Li, Florian Willomitzer, Li, Fengqiang +5
Biochemistry, Genetics and Molecular Biology · Computer Science · Physics and Astronomy · #Advanced Fluorescence Microscopy Techniques #Advanced Optical Sensing Technologies #FOS: Electrical engineering #FOS: Physical sciences #Image and Video Processing (eess.IV) #Optical measurement and interference techniques #Optics (physics.optics) #electronic engineering #information engineering

paper · pdf · doi:10.48550/arxiv.2010.06799

openalex publication_date 2020/10/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

State-of-the-art time-of-flight (ToF) based 3D sensors suffer from poor lateral and depth resolutions. In this work, we introduce a novel sensor concept that provides ToF-based 3D measurements of real world objects with depth precisions up to 35 micrometers and point cloud densities at the native sensor-resolutions of state-of-the-art CMOS/CCD cameras (up to several megapixels). Unlike other continuous-wave amplitude-modulated ToF principles, our approach exploits wavelength diversity for an interferometric surface measurement of macroscopic objects with rough or specular surfaces. Based on this principle, we introduce three different embodiments of prototype sensors, exploiting three different sensor architectures.

Citations

• Solid-state time-of-flight range camera
• Depth Map Prediction from a Single Image using a Multi-Scale Deep Network

Related

• Single-shot ToF sensing with sub-mm precision using conventional CMOS sensors
• Depth Fields: Extending Light Field Techniques to Time-of-Flight Imaging
• Frequency Domain TOF: Encoding Object Depth in Modulation Frequency
• A new operation mode for depth-focused high-sensitivity ToF range finding
• Consistent Direct Time-of-Flight Video Depth Super-Resolution