Experimentelle Untersuchungen aspektunabhängiger Sonarreflektoren nach dem Prinzip inhomogener Linsen

Corresponding to Luneberg radar reflectors inhomogeneous cylindrical lenses for sonar use are built up from concentric shells of fluid.

The target-strength of these reflectors is nearly independent of the angle of incidence and of about the same level compared to a plane mirror of equal cross-sectional area at normal incidence.

Their properties are studied with respect to wavelength and number of fluid layers. The Luneberg lenses partially coated with a pressure release cover show an angular range of independence of aspect up to six times that of corner reflectors. By contrast, Eaton-Lippmann reflectors could not be realized by fluid shells.