Bonss, S.S.BonssHeinek, A.A.HeinekLenk, A.A.LenkNeumaier, M.M.Neumaier2022-03-082022-03-082004https://publica.fraunhofer.de/handle/publica/306359Zum Aushaerten einer Innenwand (10) einer in ein Werkstueck (11) eingebrachten Bohrung (12) wird Licht (3) in einen Lichtleiter (6) unter einem Winkel zur optischen Achse (13) des Lichtleiters (6) eingekoppelt, so dass das aus dem Lichtleiter (6) am Auskoppelende (9) austretende Licht auf die seitliche Innenwand (10) der Bohrung (12) trifft.WO2004059017 A UPAB: 20040810 NOVELTY - Light from a source (2) is coupled into one end (7) of an optical system (4, 5, 6) at an angle to its optical axis (13). The optical system terminates in a probe at the other end, which is introduced freely into the bore (12). USE - To harden the inner wall of a bore machined into a workpiece. ADVANTAGE - Although the principle of internal laser hardening is known, earlier designs could not be introduced into bores below about 5 mm in diameter, because of their size. The new design overcomes this problem. There is no need for a deflection optic at the end of the probe, to turn the beam onto the inner sidewalls. Angling the entry beam into the optical system is sufficient.de608667621671patent2002-10260345