The invention relates to a fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bearing bush. The apparatus has an apertured rotating barrel which hold the garments or fabric. Inner output light Q is inner-incident to a slope of projection row PR on an emission face 33, with the result that some of the inner-incident light becomes a direct escaping light and much of the other reaches the emission face 33 again after travelling along various paths.