| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a decoloring apparatus using reflection type LED (light emitting diode) lamps as a decoloring light source, which achieves uniform decoloring without uneven irradiation, and uses less electric power. <P>SOLUTION: A decoloring light source 41 includes a linear Fresnel lens 39 positioned in the form of closing a front opening of a casing 67, and a light source base 69 is disposed along a longitudinal direction of the casing 67 on an inner wall surface opposed to the opening. A large number of reflection type LED lamps 38 are arranged side by side on the light source base 69 along the longitudinal direction thereof. When a linear direction of a prism groove 40 of the linear Fresnel lens 39 is taken to be an angle 0°, a terminal linear direction 72 made up of driving electrode terminals 47 of the reflection type LED lamps 38 and ground electrode terminals 48 is set to be preferably 45°-90°, more preferably 60°-90°. <P>COPYRIGHT: (C)2012,JPO&INPIT |
