2.1 - Multi-Wavelength Digital Holography for 3D-Shape-Measurements on Rough Surfaces

M. Fratz, D. Carl, H. Höfler, D. Skoczowski & A. Heuer
Fast and accurate Measurement of the 3D shape of objects with rough surfaces is a demanding task. We present a novel sensor for non-contact 3D-imaging based on digital holography. For this task up to six stabilized diode lasers emitting light of slightly different wavelengths are employed to illuminate the object. For each of the wavelengths three holograms are recorded with a CCD-Camera (1000 x 1000 Pixels). The hologram acquisition is permformed without an imaging lens....