The present invention is concerned with an imaging system for the self-imaging of objects, using optical waveguides comprising reflecting boundary surfaces, and satisfying the imaging condition L.lambda. = 4hN.sub..mu. W.sup.2.sub.eq, wherein L is the axial distance between the object and the self-image,...http://www.google.de/patents/US4087159?utm_source=gb-gplus-sharePatent US4087159 - Self imaging system using a waveguide
