| 摘要 |
A controlled-emission lighting device (1) comprises at least one light source (2) and an optical system (4) for the control of UGR index and luminance; the optical system (4) comprises a multi-lens optical element (8) formed by a plurality of lenses (9) arranged side-by-side along two directions, and a grid (10), located on an inner face (11), facing towards the light source (2), of the optical element (8); the grid (10) is dimensioned so as to limit the angle of incidence of the light rays that impinge on respective entry surfaces (13), facing towards the inside of the lighting device (1) and towards the light source (2), of the lenses (9); and the lenses (9) have respective exit surfaces (14) shaped so as to project the light rays passing through the grid (10) with emission angles lower than a threshold value. |
