Abstract: The device for producing and projecting light has a reflector (11) with an optical center (12), a short arc discharge lamp (13) with lamp caps (21, 22) provided with pins (23 and 24, respectively) and a lamp holder (14) in which the pin (24) of the lamp cap (22) is fixed by fixing screws (26). The lamp holder (14) has a tube (25) which accommodates the pin (24) which is provided with a longitudinal gap (27), in whose proximity and on either side of which is arranged a respective radially directed fixing screw (26). The gap (27) merges into a transverse gap (28) which covers approximately half the circumference of the tube (25). Due to the gaps (27, 28), the tube (25) has obtained parts which behave like rigid springs and keep the fixing screws (26) pressed on the pin (24). FIG. 2.

Abstract: A gas discharge laser including at least one electrode consisting of a rolled metal foil which is clamped in the tubular envelope of the laser. Spacers are provided between the foil and the inner wall of the envelope at regular distances from each other and may consist, inter alia, of pits depressed in the metal foil so that a rotationally symmetrical heat transfer from the electrode to the envelope is obtained. A thermally stable laser thus is obtained in which the generated laser beam has a substantially constant direction.

Abstract: A shock-proof gas discharge laser device comprises a cylindrical discharge vessel secured coaxially in a metal tubular holder. The cylindrical discharge vessel is sealed at its two ends with sealed metal end plates provided with supports for multilayer reflectors. The metal end plates are centered in beaker-shaped insulator caps which surround the end plates. The cylinder surface of the caps extend at least partly within the metal tubular holder in contact therewith. The electrical connections of the gas discharge laser are provided in said caps.

Abstract: A gas discharge laser comprising a glass cylindrical discharge vessel having at least one end sealed by means of a metal cap provided at its center with a reflector body and in which a metal exhaust tube is connected eccentrically to the cap. By forming the metal cap in the shape of a truncated cone and providing the metal exhaust tube in the conical surface therof, a gas discharge laser having a high degree of directional stability is obtained.

Abstract: A method of adjusting an optical element of a gas discharge laser, which element is provided at one end of a tubular metal support with the support in turn secured to the laser tube, by drawing a tubular section of the support beyond the yield point of the metal of which the tubular section consists during or after adjustment of the optical element by deformation of the tubular section throughout the circumference. An accurate adjustment of the element thereby takes place in a simple manner in which no stresses remain in the material which might otherwise maladjust the laser. The tubular section preferably consists of copper or nickel.