Patent ID: 6244731
Filing Date: 2001-06-12
Classification: F21S

Abstract:
A lamp comprising:a light source positioned on a central axis of the lamp;a composite reflector including a plurality of first reflecting units and a plurality of second reflecting units,each of the first reflecting units being a portion of the inner surface of one of a plurality of first ellipsoidal bodies, the first ellipsoidal bodies having:respective first focal points located on the center axis adjacent to the light source; andrespective second focal points located on a line that lies at a first angle relative to the center axis, and disposed in spaced relationship on a plane normal to the center axis and on a circle with its center on the center axis;each off the first reflecting units being bounded by the intersections of the respective first ellipsoidal bodies with first and second planes extending radially from the center axis and separated from each other by a second angle;the spacing of second focal points on the circle being such that the first reflecting units do not overlap;each of the second reflecting units being a portion of the inner surface of one of a plurality of second ellipsoidal bodies, the second ellipsoidal bodies having:respective first focal points located on the center axis adjacent to the light source; andrespective second focal points located on a line that lies at a third angle relative to the center axis, and disposed in spaced relationship on a plane normal to the center axis and on a circle with its center on the center axis;each of the second reflecting units being bounded by the intersections of the respective second ellipsoidal bodies with first and second planes extending radially from the center axis and separated from each other by a fourth angle;the spacing of second focal points on the circle being such that the second reflecting units do not overlap;the distances between the first reflecting units and the respective second focal points being unequal to the distances between the second reflecting units and the respective second focal points; andan aspheric lens respectively associated with each of the first and second reflecting units, the respective second focal point of each of the reflecting units being positioned on the optical axis of the associated aspheric lens to converge a reflected light beam from the respective reflecting unit.