High-precision three-dimensional shape reconstruction via digital refocusing in multi-wavelength digital holography

Autor:	Jun Ni, Carl C. Aleksoff, Li Xu
Rok vydání:	2012
Předmět:	Physics business.industry Holographic interferometry Atomic and Molecular Physics and Optics Metrology Interferometry Optics Phase noise Depth of field Tomography Electrical and Electronic Engineering business Engineering (miscellaneous) Digital holography Fresnel diffraction
Zdroj:	Applied optics. 51(15)
ISSN:	1539-4522
Popis:	Three-dimensional (3D) shape reconstructions and metrology measurements are often limited by depth-of-field constraints. Current focus-detection-based techniques are insufficient to profile out-of-focus 3D objects with high axial accuracy. Extended-focus imaging (EFI) techniques can improve the range and precision of such measurements. By incorporating digital refocusing with multiwavelength interferometry, a holographic imaging solution is presented in this paper to accurately measure 3D objects over a large depth range. Accuracy and repeatability of the proposed EFI technique are validated by digital simulations and refocusing experiments. A reconstruction example demonstrates the feasibility of high-precision 3D measurements of objects deeper than the system's classical depth of field.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a75d1e9c65f3fbe89edd6d7d952f429 https://pubmed.ncbi.nlm.nih.gov/22614599 Zobrazit plný text záznamu