If users are not able to make clear enough dot alignment at long distance, it makes good job with a high brightness 462nm blue laser diode module. It adopts qualified glass coated lens, cooperating with a glass window in front of laser beam aperture, it assures highly clear blue dot alignment under moisture or dust. Only after correct use of output power and easy mounting onto industrial machine or device, this blue dot laser always assures low cost and high precision dot alignment for both industrial and high tech fields effectively.