Reflector for dental and surgical operating room lighting fixtures

Claim 1

A reflector for dental and surgical operating room lighting fixtures which, in a spatial Cartesian coordinate system with axes x, y, z, in which x represents the optical axis of the reflector, has an elliptic shape in the plane y=0 and a parabolic shape in the plane z=0, with the parabolic shape having a focal point which coincides substantially with a closer focal point f 1 ;0;0 of the ellipse so that the latter defines a common focal point and light beams that come from the common focal point and strike the reflector in the planes y=0 and z=0, in a plane x=f 2 pass through a focal line x=f 2 ; z=0, the reflector being so constructed that, in the areas spaced from the optical axis y=0; z=0, the reflector includes distortions in the surface thereof so that light beams coming from the area of the common focal point and reflected outside planes y=0 and z=0 pass through the plane x=f 2 within a desired approximately rectangular light field and have distances from the focal line so that an essentially uniform light density is present in the light field; the shape of the reflector being determined by the equations: ##EQU11## in which p is the parameter of the parabola y=2px resulting in the plane z=0 and a and b are the large and the small semiaxis, respectively, of the ellipse resulting in the plane y=0.