| 摘要 |
A nonimaging illumination or concentration optical device. An optical device is provided having a light source, a light reflecting surface with an opening and positioned partially around the light source which is opposite the opening of the light reflecting surface. The light reflecting surface is disposed to produce a substantially uniform intensity output with the reflecting surface defined in terms of a radius vector Ri in conjunction with an angle (phi)i between Ri, a direction from the source and an angle (theta)i between direct forward illumination and the light ray reflected once from the reflecting surface. Ri varies as the exponential of tan ((phi)i-(theta)i)/2 integrated over (phi)i.
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