Abstract: A laser projector system includes a computer and a laser projector for projecting a laser image on a target surface, particularly in a factory or manufacturing environment. The computer is disposed remote from the laser project and provides the laser projector with a command and control signal. Communication between the computer and the laser projector is accomplished with power line network adapters. These adapters modulate an AC waveform to encode the command and control signal and other data. Thus, communication between the computer and the laser projector is accomplished without need for long runs of communication cables.

Abstract: A laser projection system having personnel protection utilizes a proximity detector system to detect any approach by an operator or other personnel within a predetermined protection zone. If an approach by personnel is detected within a predetermined zone, the laser output is either interrupted or reduced to a safe level, e.g., such as less than 5 mW, or to a level defined as safe for the detected approach distance. Alternatively, the proximity detector system can also utilize an array of highly directional proximity detectors, infrared detectors, and/or incorporation of a detection mechanism onto the laser projection system frame itself. An electronic circuit directly modifies the output power of the laser projector to an approved level based on feedback of the speed of the scanned beam and the detected closest approach distance.