W.c. Heraeus Gmbh

Wolfram Gorisch

Walter Wohlfart

Rainer Nitsche

Dieter Wendt

Walter Skrlac

Rolf Malkmus

Volker Ernst

Walter Kirchner

Volker Weyer

A beam guiding optical system for laser radiation, especially for the radiation of a medical laser, for the continuous adjustment of focal length is described, which is distinguished by the fact that aberrations are largely prevented. The beam guiding optical system preferably has a linearly movable carriage with at least two carriage mirrors disposed fixedly with respect to one another, at least one of these carriage mirrors being concavely or convexly curved, and the beam axis of the entry beam falling on a mirror being parallel to the beam axis of the beam emerging from the adjusting means. The axis of displacement of the carriage is aligned parallel to the beam axis of the entry and emerging beam. In the beam path outside of the adjusting means there is disposed at least one deflecting mirror which has a curvature complementary to the curvature of the at least one curved carriage mirror. These mirrors are surface elements of solids of rotation of cone sections, which are aligned with one another such that the corresponding focal points of the at least one deflecting mirror in the beam path outside of the adjusting means lie in the plane which is spanned by the incident and reflected beam of the aforesaid at least one deflecting mirror.

Beam guiding optical system for laser radiation

A gas laser has a coolable inner electrode for connection to a radio-frequency power source and a coolable outer electrode that is coaxial with and radially spaced from the inner electrode with an excitation space containing the gas to be excited in the radial space between the inner and outer electrodes. With a view to improving a laser of this type in such a way that excitation at higher power with retention of homogeneous discharge is possible, that gas decomposition is slower, and that any desired liquid coolant can be used regardless of the electrical conditions, the excitation space is radially bounded by two, tubular dielectric bodies which are coaxial with and radially spaced from each other.

Gas laser and production process therefor

A gas laser has (1) a reflecting body with a reflecting surface, (2) excitation space structure cooperative with the reflecting body for defining an excitation space which is open opposite the reflecting surface of the reflecting body, (3) devices for lasingly exciting a gas in the excitation space and (4) a mirror assembly. The mirror assembly has a mirror having a reflecting surface facing the opening in the excitation space. A radial flange is about the mirror with the reflecting surface of the mirror on one axial side of the radial flange. At least one spacer and, preferably three, circumferentially-spaced bars project from the excitation space structure and engage the radial flange substantially axially for supporting it at least one of axially slidably and tiltably. Bellows sealingly connect the one axial side of the radial flange to the opening of the excitation space structure and its other axial side to a backplate immovably connected to the spacer bar on the other axial side of the radial flange. Preferably, the reflecting body is another such mirror assembly.

Mirror assembly for gas laser

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Aschaffenburg, Germany

Wolfram Gorisch