| 摘要 |
<p>The invention relates to a method and arrangement for short coherence holography for distance measurement, for profile detection and/or for 3D detection of one or more object elements and/or object areas and/or objects or for readout of holographic volume memories with a holographic interferometer and with at least one short coherence light source. For each optically detected object element in the hologram the holographic interferometer has an optical path difference clearly unequal to zero. For optical detection of the object in the form of holograms at least one spectrally integrally detecting, rastered detector is arranged. According to the invention the short coherence light source with frequency comb is designed with the optical delay length Y1. Detected holograms are digitally reconstructed. Relative distances of object elements with respect to one another or also absolute distances relative to a reference in the arrangement for holographic interferometry are digitally calculated from the hologram reconstructions, so that finally a 3D point cloud of object elements and/or object areas and/or objects is produced. Using the approach according to the invention it is also possible for data to be read out optically in parallelised form from holographic volume memories or three-dimensionally structured signatures.</p> |
