| 摘要 |
The invention relates a lighting device (10), comprising at least one light source and a light emission surface (2), wherein the lighting device (10) in operation has a luminous intensity distribution and a radiant intensity distribution, wherein during the measurement of the radiant intensity distribution and the luminous intensity distribution in a spherical coordinate system, which has an amplitude (?) and an azimuth angle (f), a maximum (3) of the luminous intensity distribution is located on an imaginary main straight line (24) through the amplitude (?) of 0º and the azimuth angle (f) of 0º through a center (21) of the light emission surface (2), and wherein a direction of the lowest decrease in luminous intensity starting from the maximum (3) of the luminous intensity distribution is arranged in an imaginary main plane (4) through the amplitude (?) of 0º, and wherein the radiant intensity (L) in an imaginary plane (7) through an azimuth angle (f) of 0º within an amplitude region of 4º, preferably of 3º, decreases by at least 90% with respect to the radiant intensity (L0) occurring in the direction of the maximum (3) of the luminous intensity distribution. |
