APPARATUS FOR SENSING LASER BEAMS OVER NARROW BAND WITH WIDE EFFECTIVE INCIDENT ANGLE

摘要

PURPOSE: A narrow band laser detecting device having a wide effective incidence angle is provided to accurately detect layer beam of fixed band without noise. CONSTITUTION: A narrow band laser detecting device having a wide effective incidence angle comprises a laser sensor(300), an optical filter(310) and an optical lens(320). The laser sensor senses the laser beam and changes into an electric signal in order to output. The optical filter is arranged in the front side of the laser sensor. The laser beam of the fixed specific wavelength band is passed through the optical filter and transmitted to the laser sensor. The optical lens is arranged in the front side of the optical filter.