Patent ID: 7462806

Claim:
An dazzle prevention device having an electromagnetic wave detection function, the device protecting eyes of an operator from light generated from a welding or cutting torch, comprising: optical detection means for detecting light generated from the welding or cutting torch; electromagnetic wave sensor means for detecting an electromagnetic wave generated from the welding or cutting torch; electromagnetic wave detection means for comparing a signal, which is input through the electromagnetic wave sensor means and resonated with a variably set reference value when an electromagnetic wave detection means drive signal is applied; control means for, as the optical detection means staffs to detect light, applying the electromagnetic wave detection means drive signal to the electromagnetic wave detection means and monitoring variation of an electromagnetic signal using an output of the electromagnetic wave detection means; and light transmission control means for controlling variation of light transmittance of a dazzle prevention plate in response to an output signal from the control means, wherein the electromagnetic wave detection means includes a user interface that comprises: mode selection means capable of allowing the operator to select mode 1 using only the optical detection means or mode 2 using both the optical detection means and the electromagnetic wave detection means; and display means capable of displaying a selected mode.