The present invention relates to a multifunctional antiglare device having a variety of functions, including the functions of a timer, stopwatch, world clock, compass, and the like. The multifunctional antiglare device comprises: optical detection means for detecting light generated from a welding or cutting torch an electromagnetic-wave sensing means for sensing electromagnetic waves generated by the welding or cutting torch electromagnetic-wave detecting means for comparing the signal inputted through the electromagnetic-wave sensing means and which resonates with a variably set reference value when an operating signal for the electromagnetic-wave detecting means is applied a control means for applying the operating signal for the electromagnetic-wave detecting means to the electromagnetic-wave detecting means when the optical detecting means starts optical detection, so as to monitor the variation in the electromagnetic-wave signal inputted from an output of the electromagnetic-wave detecting means light transmission control means for controlling the variation in the light transmission of an antiglare plate in accordance with the signal outputted from the control means a geomagnetic sensor for sensing an azimuth angle using the magnetic field of the Earth and compass display means for displaying the shape of a compass in accordance with the azimuth angle sensed by the geomagnetic sensor.La présente invention concerne un dispositif antireflet multifonction ayant des fonctions variées, dont les fonctions de temporisateur, chronomètre, horloge mondiale, boussole, etc. Le dispositif antireflet multifonction comprend : des moyens de détection optique servant à détecter la lumière générée par un chalumeau soudeur ou coupeur des moyens de détection dondes électromagnétiques servant à détecter les ondes électromagnétiques générées par le chalumeau soudeur ou coupeur des moyens détectant les ondes électromagnétiques servant à comparer le signal entré au moyen des moyens d
