| 摘要 |
PURPOSE:To radiate the light introduced into a photoconductor effectively to the outside of the photoconductor from a light scattering material part with simple and inexpensive constitution by inscribing a spiral groove on the surface of the photoconductor. CONSTITUTION:The light L introduced into a photoconductor 1 is reflected by a groove 2 inscribed spirally on the surface of the photoconductor 1 and is radiated effectively to the outside of the photoconductor so as to be used for illumination or others. If the pitch P of the groove 2 is made successively shorter along the advancing direction of the light L in this case, the light can be radiated approximately uniformly from the entire part of the photoconductor 1. When a reflecting plate 3 is provided on the terminal face of the photoconductor, the light reflected by the plate 3 and returned into the photoconductor 1 is also radiated in the radial direction of the photoconductor 1 and the light introduced into the photoconductor 1 is radiated effectively to the outside of the photoconductor. |
