Aerodynamic window for a gas laser
AssigneeFraunhofer-Gessellschaft zur Forderung der angewandten Forschung e.V.
InventorsKeming Du, Joachim Franek, Peter Loosen
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Abstract
Aerodynamic window for a gas laser, whose active chamber emits a focussed ser beam and is flow connected by means of a beam passage opening with a window chamber connected to a vacuum pump and which has a beam exit opening in an outer area which is preferably under atmospheric pressure. In order to reduce the pumping power necessary for the aerodynamic window and improve the laser beam quality, the window is so constructed that the laser beam emitted by the active chamber has a first focus in the vicinity of the beam passage opening and is deflected onto a focussing mirror arranged in the window chamber and which gives the laser beam leaving the latter a second focus located in the vicinity of the beam exit opening.
Claims9
An aerodynamic window for a gas laser, which has an active chamber and emits a focussed laser beam and is flow connected by means of a beam passage opening with a window chamber connected to a vacuum pump and which has a beam exit opening in an outer area which is preferably under atmospheric pressure, characterized in that the laser beam (11) emitted by the active chamber (10) has a first focus (16) in the vicinity of the beam passage opening (12) and is deflected onto a focussing mirror (17,31,27) located in the window chamber (13) and from which the laser beam (11') leaving the window chamber (13) is given a second focus (18) in the vicinity of the beam exit opening (14).
Dependencies are inferred from the claim text.