Streulichtaufnahmen und Fluoreszenzmessungen mit einem Unterwasserlidar

The underwater lidar is presented as a new optical instrument for seafloor monitoring. It is a combination of a range gated video system and a fluorescence lidar. Lidar equation and image formation are discussed, with a focus on multiple scattering effects. Inversion algorithms of fluorescence lidar signals provide optical characteristics of water column, sunken pollutant and sea bottom, e.g. emission spectrum and fluorescence lifetime. The optical transfer functions of water columns are determined, and a restoration algorithm is applied for deconvolution of range gated video images. The performance of the sensor depends on optical properties of the water column, the seafloor, the pollutants and the targets. These characteristics cover a wide range - from clear ocean to turbid river water, from dark mud to white sand, from strong fluorescent to non-fluorescent substances, from black to white objects - so that a general statement cannot be made. Nevertheless, the equations given by this work allow to predict signals and images for every defined scenario.

Level thesis:degree_level

thesis.doctoral

Grantor dc:publisher

Universität Oldenburg

Year

2000

Author dc:creator

• Harsdorf, Stefan

• [Keine Schlagwörter von Autor/in vergeben.]

Repository record source_url

http://oops.uni-oldenburg.de/385

OAI identifier oai:identifier

oai:oops.uni-oldenburg.de:385