A multi-point light delivery device comprising a waveguide (1) comprising a plurality of optical windows (10) through which light is carried and carried out along the longitudinal axis and out-coupled from the waveguide. The waveguide comprises a tapered region (5) along which the optical window is distributed, and each optical window out-couples a specific subset of the modes of propagation of light to which the optical window is matched. Ring. [Selection] Figure 1長手軸に沿って光を運びかつ運ばれる光が通って導波管からアウトカップリングされる複数の光学窓(10)を含む導波管(1)を備える、多点光配送デバイス。導波管は、光学窓が沿って分布される先細の領域(5)を備え、かつ、各光学窓は、光学窓がマッチングされる、運ばれる光の伝搬モードの特定の部分集合をアウトカップリングする。【選択図】 図1