ILLUMINATING APPARATUS AND PROJECTOR

摘要

Bright illuminating light is outputted by preventing fluctuation of quantity of outputting illuminating light by a simple configuration. An illuminating apparatus (1) is provided with a plurality of light sources (2) arranged at equal intervals in a circumference direction; a first light guide member (3c) for guiding illuminating light outputted from the light source (2); a driving device (3d) for rotating the first light guide member around axis line; and a second light guide member (4), which permits the illuminating light outputted from an outputting end (3a) of the first light guide member (3c) to enter and guides the light, and is fixed to the light source (2). The outputting end (3a) of the first light guide member (3c) and an inputting end (4a) of the second light guide member (4) have substantially regular polygonal opened shapes with an axis line (C) at the gravity center. The second light guide member (4) is arranged to the light source (2) to satisfy a phase relationship, where an angular position of the first light guide member (3c) having the minimum illuminating light quantity outputted from the outputting end (3a) and an angular position of the first light guide member (3c) having the minimum overlapping area of the opened shape of the outputting end (3a) and the opened shape of the inputting end (4a) do not accord with each other.