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.

Abstract: A high performance compound reflector and cooling system for use with a projection system having a lamp for emitting light, an ellipsoid reflector for capturing said light from a first focal point of the ellipsoid reflector and focusing said light at a second focal point co-incident with an integrator rod, and a spherical reflector for retro-reflecting light through the first focal point for reflection by said ellipsoid retractor to said second focal point. The shape of the ellipsoid reflector according to the present invention allows the spherical element to have a larger diameter at the interface between the ellipsoid and sphere. This provides a location for an air deflector in a shape similar to the back of the ellipsoid for channeling air over and outside of the ellipsoid and than along tho inside of the sphere. The design of the reflector and air deflector allow cooling requirements to be substantially reduced.