Patent ID: 7470880

Claim:
An apparatus for detecting an electromagnetic wave and protecting eyes from glare, the apparatus comprising: an anti-glare eye protection plate for protecting eyes of a worker from light generated by a welding or cutting torch; an optical detector for detecting light generated by the welding or cutting torch; an electromagnetic wave sensor for sensing an electromagnetic wave generated by the welding or cutting torch using at least two coils each having a different shape or different orientation; an electromagnetic wave detector for comparing a signal, which is amplified after being received through the electromagnetic wave sensor, with a preset reference value which can be varied; a user interface including a display for selecting or displaying one of the optical detector and the electromagnetic wave detector; a main controller for applying an electromagnetic wave detector activation signal to the electromagnetic wave detector as the optical detector starts optical detection and monitoring changes in a received electromagnetic wave signal based on an output of the electromagnetic wave detector and then outputting the monitored result; and a light transmittance controller for controlling a change in light transmittance of the anti-glare eye protection plate according to a signal output from the main controller, wherein the electromagnetic wave detector includes: a resonator for resonating an electromagnetic wave signal received through the electromagnetic wave sensor; and a filter for removing noise from an output of the resonator, the resonator and the filter including two combinations of resonator and filter portions, the two combinations being provided respectively for the first and second coils.