| 摘要 |
A reflector lamp comprising a concave reflector having a parabolic rear section, a spherical intermediate section, and a parabolic front section, each of the reflector sections having substantially the same common focal point, and a finite light source at the substantially common focal point, the reflector sections being dimensioned so that substantially all light rays from the finite light source which are reflected by the spherical intermediate section become re-reflected by the parabolic front section.
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