Open AccessEndoscopic pulsed digital holography for 3D measurements
Author(s) -
Andres Saucedo,
Fernando Mendoza Santoyo,
Manuel De la Torre-Ibarra,
Giancarlo Pedrini,
Wolfgang Osten
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.001468
Subject(s) - holography , optics , reference beam , digital holography , fourier transform , physics , displacement (psychology) , digital holographic microscopy , psychology , quantum mechanics , psychotherapist
A rigid endoscope and three different object illumination source positions are used in pulsed digital holography to measure the three orthogonal displacement components from hidden areas of a harmonically vibrating metallic cylinder. In order to obtain simultaneous 3D information from the optical set up, it is necessary to match the optical paths of each of the reference object beam pairs, but to incoherently mismatch the three reference object beam pairs, such that three pulsed digital holograms are incoherently recorded within a single frame of the CCD sensor. The phase difference is obtained using the Fourier method and by subtracting two digital holograms captured for two different object positions.