Abstract: A device for the detection of wetness in wheel arches of road vehicles includes at least one sensor arrangement including at least one capacitive moisture sensor with two electrodes, electrically insulated with respect to one another, and with at least one evaluation unit, the electrodes, electrically insulated with respect to one another, are arranged on a carrier element, that the electrodes, electrically insulated with respect to one another, are formed by two detection sections arranged parallel to one another, and that the detection sections, when used as intended, are aligned respectively in a rising manner in their longitudinal extent. The device also relates to a road vehicle for the detection of wetness, with at least one wheel arch, with which provision is made according to the invention that the wheel arch is delimited by a wheel-housing shell, at which a device according to the invention is arranged.

Abstract: A method is presented for operating a laser radiation device (10) that has an illumination laser (14) and an active laser (13), and wherein, in a first operating mode of the laser radiation device (10) in which the active laser (13) does not emit any active laser radiation (20), the illumination laser (14) is operated in such a way that its illumination laser radiation (22) has a first illumination laser radiant flux. The method is characterized in that, in a second operating mode of the laser radiation device (10) in which the active laser (13) emits active laser radiation (20), the illumination laser (14) is operated such that its illumination laser radiation (22) has a second illumination laser radiant flux that is greater than the first illumination laser radiant flux.

Abstract: A protection device for a laser system having at least one active laser and having at least one beam guide. Eye safety and/or protection for an exposed person is achieved using at least one additional laser as a warning laser which, operating in a visible spectral range, is used shortly before the active laser is used, and which, can cause at least one person to close his or her eyes and/or change his or her viewing direction away from the receptor point of the active laser beam on a target.

Abstract: A protection device for a laser system having at least one active laser and having at least one beam guide. Eye safety and/or protection for an exposed person is achieved using at least one additional laser as a warning laser which, operating in a visible spectral range, is used shortly before the active laser is used, and which, can cause at least one person to close his or her eyes and/or change his or her viewing direction away from the receptor point of the active laser beam on a target.