| 摘要 |
A light-guiding device having a coupling-in surface ( 46 ) for coupling-in light radiation substantially in a first main direction ( 41 ) perpendicular to said coupling-in surface ( 26;46 ), and having a coupling-out surface ( 47,48,49 ) for coupling-out light radiation substantially in a second main direction ( 42 ) perpendicular to said coupling-out surface. The coupling-out surface has other dimensions than the coupling-in surface ( 46 ). The device comprises a number of plate-like light-guiding members ( 43,44,45 ), each having a substantially rectangular lateral coupling-in surface and a substantially rectangular lateral coupling-out surface ( 47,48,49 ). A number of the plate-like light-guiding members are stacked together to create the coupling-in surface ( 46 ) formed by said lateral coupling-in surfaces abutting each other at their long sides. The coupling-out surface ( 47,48,49 ) is created by said lateral coupling-out surfaces abutting each other at their short sides.
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