| 摘要 |
<p>The invention relates to a light concentrator that comprises: a plate (1) having two main faces (10, 11), a wafer (13) between the two main faces (10, 11), a refractive index gradient existing between the two main faces (10, 11) and a diffraction grating (2) operating in reflection or in semi-reflection that cooperates with one of the main faces (11) of the plate, that face having the highest refractive index, the main face (10) having the lowest refractive index forming a front face for entry of the light, at least one exit zone (12) for the light being placed on the wafer (13).</p> |
