| 摘要 |
The invention relates to an optical device for creating an illumination window (50), the optical device comprising a plurality of radiation sources (11, 12, 13, 14) and an optical element (10). The optical element (10) is arranged to create a substantially collimated radiation beam (20) from radiation generated by the plurality of radiation sources (11, 12, 13, 14), in which the radiation generated by the respective plurality of radiation sources (11, 12, 13, 14) is substantially unmixed. The optical device further comprises a first lens plate (30) having a plurality of first sub-lenses (31) of the first lens plate (30), in which each first sub-lens (31) projects a part of the radiation beam (20) at an illumination window (50), such that the projections of each first sub-lens (31) at least partially overlap. |
