A common focus energy emitter (100, 150) for emitting an exit beam, the emitter having an energy emitter axis and comprising: (a) a common focus energy source for emitting an exit beam through an exit beam aperture, said common focus energy source and said exit beam aperture defining the energy emitter axis; and (b) at least two spaced apart energy source units each having: (i) an energy source for emitting energy, (ii) a three dimensional concave primary reflector for reflecting energy emitted by its associated energy source into an energy beam focused at said common focus energy source, said primary reflector bounding a minor three dimensional concave section of an imaginary primary reflector ellipsoid of revolution having a primary reflector axis of revolution non-coaxial with the energy emitter axis, said imaginary primary reflector ellipsoid of revolution having a semi-major axis and a semi-minor axis in an imaginary plane including the energy emitter axis, said primary reflector axis of revolution including a pair of spaced apart focal points, said pair of spaced apart focal points including a first focal point located at said common focus energy source and a second focal point at which its associated energy source is disposed thereat, said primary reflector axis of revolution subtending a primary reflector tilt angle relative to said imaginary plane including the energy emitter axis, and (iii) a secondary optical element (113, 123, 151, 160, 170) for shaping said energy beam from its associated primary reflector traversing said common focus energy source into an exit beam component of the exit beam, characterized in that the secondary optical element being additionally formed with a second aperture coaxial with the energy emitter axis and on the opposite side of the common focus energy source relative to the exit beam aperture. (a) a common focus energy source for emitting an exit beam through an exit beam aperture, said common focus energy source and said exit beam aperture defining the energy emitter axis; and (b) at least two spaced apart energy source units each having: (i) an energy source for emitting energy, (ii) a three dimensional concave primary reflector for reflecting energy emitted by its associated energy source into an energy beam focused at said common focus energy source, said primary reflector bounding a minor three dimensional concave section of an imaginary primary reflector ellipsoid of revolution having a primary reflector axis of revolution non-coaxial with the energy emitter axis, said imaginary primary reflector ellipsoid of revolution having a semi-major axis and a semi-minor axis in an imaginary plane including the energy emitter axis, said primary reflector axis of revolution including a pair of spaced apart focal points, said pair of spaced apart focal points including a first focal point located at said common focus energy source and a second focal point at which its associated energy source is disposed thereat, said primary reflector axis of revolution subtending a primary reflector tilt angle relative to said imaginary plane including the energy emitter axis, and (iii) a secondary optical element (113, 123, 151, 160, 170) for shaping said energy beam from its associated primary reflector traversing said common focus energy source into an exit beam component of the exit beam, (i) an energy source for emitting energy, (ii) a three dimensional concave primary reflector for reflecting energy emitted by its associated energy source into an energy beam focused at said common focus energy source, said primary reflector bounding a minor three dimensional concave section of an imaginary primary reflector ellipsoid of revolution having a primary reflector axis of revolution non-coaxial with the energy emitter axis, said imaginary primary reflector ellipsoid of revolution having a semi-major axis and a semi-minor axis in an imaginary plane including the energy emitter axis, said primary reflector axis of revolution including a pair of spaced apart focal points, said pair of spaced apart focal points including a first focal point located at said common focus energy source and a second focal point at which its associated energy source is disposed thereat, said primary reflector axis of revolution subtending a primary reflector tilt angle relative to said imaginary plane including the energy emitter axis, and (iii) a secondary optical element (113, 123, 151, 160, 170) for shaping said energy beam from its associated primary reflector traversing said common focus energy source into an exit beam component of the exit beam,