2022/03/18 by Sebastian Ritter, Meritxell Cabrejo-Ponce, Ritter, Sebastian +10
Computer Science · Engineering · Physics and Astronomy · #Artificial intelligence #Computer science #Diffraction grating #FOS: Electrical engineering #FOS: Physical sciences #Femtosecond #Geology #Grating #Hyperspectral imaging #Image and Video Processing (eess.IV) #Laser #Laser Material Processing Techniques #Materials science #Optical measurement and interference techniques #Optics #Optics (physics.optics) #Physics #Picosecond #Projection (relational algebra) #Remote sensing #Resolution (logic) #Surface Roughness and Optical Measurements #eess.IV #electronic engineering #information engineering #physics.optics
paper · pdf · doi:10.48550/arxiv.2203.10008
published in arXiv (Cornell University) (Cornell University) · 11 pages, 11 figures To be published in Optica Applied Optics
arxiv created 2022/03/18 · openalex publication_date 2022/03/18 · arxiv updated 2022/03/21 · openalex created_date 2022/05/05 · openalex updated_date 2026/07/28
Active stereovision systems for the 3D measurement of surfaces rely on the sequential projection of different fringe patterns onto the scene to robustly and accurately generate 3D surface data. This limits the temporal resolution to the time by which a sufficiently high number of patterns can be projected and recorded. By encoding patterns spectrally and recording them with a hyperspectral imager, it is possible to record several patterns in a single image, limiting the temporal resolution to only the duration of the illumination. A picosecond 3D surface measurement was demonstrated using a high pulse energy femtosecond Ti:Sa laser, spectrally broadened in a hollow core fiber, and two hyperspectral cameras recording the patterns generated by diffraction at an Echelle grating.