Patent ID: 8157385

Claim:
A reflector used in combination with a light emitting portion that emits light and disposed around a central axis on which the light emitting portion is disposed, the reflector comprising: a curved reflection section having the substantially same shape as that of a surface of revolution around the central axis, the curved reflection section reflecting light from the light emitting portion; and a flat deflection section formed on a substantially flat surface, the substantially flat surface being disposed closer to the central axis than the curved reflection section, the flat deflection section deflecting the light from the light emitting portion directly toward an opening on an opposite side of the light emitting portion; wherein the flat deflection section has a plurality of structural members formed on the flat surface, and when an ellipse is defined with reference to first and second focal points and the light emitting portion is disposed at the first focal point, the plurality of structural members are substantially concentrically arranged around a position that corresponds to the second focal point.