title: Lensless phase microscopy using phase retrieval with multiple illumination wavelengths.
abstract: A phase retrieval method for microscopy using multiple illumination wavelengths is proposed. A fast algorithm suitable for calculations with high numerical aperture is used for the iterative retrieval of the object wavefront. The advantages and limitations of the technique are systematically analyzed and demonstrated by both simulation and experimental results.
authors.affiliation: Institut für Technische Optik, Universität Stuttgart, Pfaffenwaldring 9, 70569, Stuttgart, Germany. itobaope@ito.uni‐stuttgart.de
authors.forename: Peng
authors.initials: P
authors.lastname: Bao
authors.forename: Guohai
authors.initials: G
authors.lastname: Situ
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Pedrini
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Osten
mesh_terms: D000465:Algorithms; D007089:Image Enhancement / Q000379:methods; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods; D007834:Lasers; D008027:Light; D008853:Microscopy / Q000379:methods*; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods