Patent ID: 7331699
Filing Date: 2008-02-19
Classification: F21V,F21W,G02B

Abstract:
1. A light source unit for use with a replaceable lamp unit comprising an elliptical reflector having a ceramic mounting ring attached to a rim thereof, the ceramic mounting ring having frontal fiduciary surfaces precisely positioned longitudinally relative to a point light source of the lamp unit, and transverse fiduciary surfaces precisely positioned laterally relative to the point light source, wherein the light source unit comprises a lamp unit support having a reference surface to receive the ceramic mounting ring of said lamp unit so that the ring extends around an opening in the lamp unit support, a pair of guide rails disposed one on each side of the opening, and stops protruding axially from the reference surface between the guide rails at one end thereof, the stops being spaced apart and oriented so as to mate with a pair of the transverse fiduciary surfaces of the lamp unit, the guide rails being spaced from the reference surface so as to engage opposite sides of the ceramic ring of the lamp unit being inserted laterally therebetween but to provide clearance once the lamp unit has been fully inserted, the light source unit further comprising clamping means engageable once the lamp unit has been fully inserted, to urge the lamp unit longitudinally to force frontal fiduciary surfaces of the ring into contact with the reference surface and to urge the lamp unit laterally to force a pair of the transverse fiduciary surfaces of the ring against the stops.