Abstract: A completion assembly useful to fracture pack, gravel pack or otherwise treat production intervals traversed by an uncased wellbore is presented. The completion assembly may be used to stimulate production and/or prevent production of solid particles from the production intervals. A single trip method to fracture pack, gravel pack or otherwise treat multiple zones in an open-hole wellbore is disclosed where the wellbore has no liner or casing string installed through a production open hole portion.

Abstract: A light-emitting semi-conductor diode comprising a light emitting chip at least partially surrounded by a transparent electronics protecting body on which a composite layer foil is disposed, the composite layer foil includes at its side facing away from the electronics protection body a carrier layer, which has a refraction index that is greater than the refraction index of the electronics protection body and, at the opposite side, an active layer of the same material of which the electronics protecting body consists.

Abstract: A completion assembly useful to fracture pack, gravel pack or otherwise treat production intervals traversed by an uncased wellbore to stimulate production and/or prevent production of solid particles from the production intervals and a single trip method to fracture pack, gravel pack or otherwise treat multiple zones in an open-hole wellbore having no liner or casing string installed through a production open hole portion.

Abstract: An optical waveguide system has a discharge lamp with a reflector and an asymmetrical burner. The reflector has a reflecting surface and a hollow reflector neck. The asymmetrical burner is partly arranged in the hollow reflector neck, without making contact with it. The shape and the size of the inner contour of the reflecting surface of the reflector corresponds substantially to the contour of the asymmetrical burner, and the asymmetrical burner is centrally located in the reflector.

Abstract: The invention relates to a lighting unit having at least one light source and at least one light guide following the source and at least partially surrounding it, said light guide including at least one light exit surface facing away from the source and at least approximately located centrally, surrounded by at least one externally located light exit surface. In addition, at least one externally located light exit surface comprises a plurality of surface elements adjacent to each other with or without offset. These surface elements are surface regions of curved solids. With the present invention, a compact lighting unit is developed that makes possible a uniformly high yield in a preassigned target region.

Abstract: A light-emitting semi-conductor diode comprising a light emitting chip at least partially surrounded by a transparent electronics protecting body on which a composite layer foil is disposed, the composite layer foil includes at its side facing away from the electronics protection body a carrier layer, which has a refraction index that is greater than the refraction index of the electronics protection body and, at the opposite side, an active layer of the same material of which the electronics protecting body consists.

Abstract: An optical waveguide system has a discharge lamp with a reflector and an asymmetrical burner. The reflector has a reflecting surface and a hollow reflector neck. The asymmetrical burner is partly arranged in the hollow reflector neck, without making contact with it. The shape and the size of the inner contour of the reflecting surface of the reflector corresponds substantially to the contour of the asymmetrical burner, and the asymmetrical burner is centrally located in the reflector.

Abstract: The invention relates to a discharge lamp with a reflector (1) and an asymmetrical burner, which reflector (1) comprises at least a reflecting surface (3) and a hollow reflector neck (4), while the asymmetrical burner is partly arranged in said hollow reflector neck (4) without making contact therewith, wherein the shape and the size of the inner contour (6) of the reflecting surface (3) of the reflector (1) corresponds substantially to the contour of the asymmetrical burner, and the asymmetrical burner is centrally located in the reflector (1).

Abstract: The invention relates to a lighting unit having at least one light source and at least one light guide following the source and at least partially surrounding it, said light guide including at least one light exit surface facing away from the source and at least approximately located centrally, surrounded by at least one externally located light exit surface. In addition, at least one externally located light exit surface comprises a plurality of surface elements adjacent to each other with or without offset. These surface elements are surface regions of curved solids. With the present invention, a compact lighting unit is developed that makes possible a uniformly high yield in a preassigned target region.

Abstract: The invention relates to a discharge lamp with a reflector (1) and an asymmetrical burner, which reflector (1) comprises at least a reflecting surface (3) and a hollow reflector neck (4), while the asymmetrical burner is partly arranged in said hollow reflector neck (4) without making contact therewith, wherein the shape and the size of the inner contour (6) of the reflecting surface (3) of the reflector (1) corresponds substantially to the contour of the asymmetrical burner, and the asymmetrical burner is centrally located in the reflector (1).

Abstract: A lighting device with a light source and a first reflector which directs light provided by the light source towards at least two focal points in the operational state, is to be constructed such that the light path to one of the focal points can be obstructed without thermal problems arising. A second reflector is provided which diverts away at least partly the light guided by the first reflector to a first of the two focal points towards the second one of the two focal points, directly or indirectly, as desired.

Abstract: A lighting device with a light source and a first reflector which directs light provided by the light source towards at least two focal points in the operational state, is to be constructed such that the light path to one of the focal points can be obstructed without thermal problems arising. A second reflector is provided which diverts away at least partly the light guided by the first reflector to a first of the two focal points towards the second one of the two focal points, directly or indirectly, as desired.