Projectors, more particularly motor vehicle headlights

Claim 1

A LIGHT PROJECTOR COMPRISING A REFLECTOR HAVING THE SHAPE OF A PARABOLOID OF REVOLUTION WITH A CIRCULAR APERTURE, SAID REFLECTOR HAVING A FOCUS, A LIGHT SOURCE AT SAID FOCUS, SAID REFLECTOR ENVELOPING SAID LIGHT SOURCE AND COLLECTING TO A MAXIMUM LIGHT FLUX EMITTED BY SAID SOURCE TO REFLECT THE LIGHT FLUX FORWARDLY THROUGH THE APERTURE TO PROVIDE ILLUMINATION, SAID REFLECTOR INCLUDING A PORTION CONSTITUTING A WINDOW WHICH PERMITS THE PASSAGE THERETHROUGH OF LIGHT, SAID WINDOW HAVING AN OUTLINE OF GENERALLY RECTANGULAR FORM WITH SUBSTANTIAL EXTENT IN BOTH DIMENSIONS, AN OUTER REFLECTOR SUPPORTING THE FIRST SAID REFLECTOR THEREWITHIN AS A SELF-CONTAINED UNIT, SAID OUTER REFLECTOR PRESENTING A RELATIVELY LARGE APPARENT AREA OF GENERALLY RECTANGULAR SHAPE NARROWER IN EXTENT THAN THE APERTURE OF THE REFLECTOR BUT LATERALLY PROJECTING THEREBEYOND FOR REFLECTING LIGHT FLUX PASSING THROUGH THE WINDOW IN THE INNER REFLECTOR TO INCREASE THE RANGE OF THE PROJECTOR WHILE THE OVERALL SIZE OF THE PROJECTOR IS RESTRICTED IN ONE DIMENSION TO THE DIAMETER OF THE INNER REFLECTOR, SAID OUTER REFLECTOR HAVING THE SHAPE OF A PARABOLOID OF REVOLUTION WITH A FOCUS COINCIDENT WITH THE LIGHT SOURCE, SAID OUTER REFLECTOR HAVING AN OUTER CONTOUR CORRSPONDING IN SHAPE WITH THAT OF THE WINDOW IN THE INNER REFLECTOR AND BEING LOCATED BEHIND THE LATTER A DISTANCE RELATED TO THE SIZE OF THE WINDOW AND THE DISTANCE OF THE LIGHT SOURCE FROM THE SURFACE OF THE INNER REFLECTOR TO DIRECTLY COLLECT AND REFLECT ALL OF THE DIRECTLY EMITTED LIGHT FLUX FROM THE LIGHT SOURCE WHICH PASSES THROUGH THE WINDOW IN A DIRECTION PARALLEL TO THE LIGHT FLUX REFLECTED FROM THE INNER REFLECTOR, THE OUTER REFLECTOR EXTENDING FORWARDLY OF THE OPENING OF THE INNER REFLECTOR TO RECEIVE DIRECTLY EMITTED LIGHT FLUX FROM THE LIGHT SOURCE FOR REFLECTING THE RECEIVED LIGHT FLUX FORWARDLY AND PARALLEL TO THE LIGHT FLUX REFLECTED FROM THE INNER REFLECTOR.