| 摘要 |
The invention relates to a lighting device with at least one laser light source (3; 3'), at least one TIR optical system (1; 1') into which light from the at least one laser light source (3; 3') is coupled, and at least one light wavelength conversion element (2; 2') which is arranged on a surface (120; 110') of the TIR optical system (1; 1') such that light emitted from the at least one laser light source (3; 3') and coupled into the at least one TIR optical system (1; 1') is transferred into the light wavelength conversion element (2; 2') via said surface (120; 110'). The at least one laser light source (3; 3') and the at least one TIR optical system (1; 1') are oriented relative to each other such that the light being transferred into the at least one light wavelength conversion element (2; 2') via the aforementioned surface (120; 110') is incident on said surface (120; 110') at angles of incidence which are greater or equal to a threshold angle Theta defined as follows: Theta = arcsin [n1/n2], wherein n1 is the refractive index of air, and n2 is the refractive index of the at least one TIR optical system at the specified surface. |
