| 摘要 |
The stud has an LED (21) i.e. white or green power diode, for emission of a light beam. An optical unit focuses a part of the beam towards a predetermined area of a space, where the optical unit comprises a lens (31). The optical unit defines a rear reflective surface (41) that carries out luminous reflection in the lens, where the rear surface is concave on a level of an arrival zone of the beam emanating from the LED. A front reflective surface (42) focuses another part of the beam towards another predetermined area of the space. |
