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CN103891262A 照明单元以及使用该照明单元的图像读取装置 无效 - 驳回 复审申请

照明单元以及使用该照明单元的图像读取装置
摘要：
本发明的照明单元(2)具备：LED阵列(220)，该LED阵列(220)的发光元件在主扫描方向上配置成阵列状；圆筒抛物面反射镜(20)，该圆筒抛物面反射镜(20)将从LED阵列(220)射出的光照射至被照明体的照明区域；以及壳体，该壳体收纳或保持LED阵列(220)及圆筒抛物面反射镜(20)。圆筒抛物面反射镜(20)形成为使得在副扫描方向(12)上具有曲率的圆筒抛物面形状为用与圆筒抛物面形状的顶点相垂直的轴面沿主扫描方向(11)切取而得到的形状。LED阵列(220)配置为使得其发光方向的中心轴垂直于轴面，其发光区域包含圆筒抛物面形状的焦点位置。
摘要（英）：

A lighting unit (2) is provided with: LED arrays (220) having light-emitting elements positioned in an array form in a main scanning direction; cylindrical parabolic mirrors (20) that project light radiated from the LED arrays (220) on an illumination area of a body to be illuminated; and a housing that houses or holds the LED arrays (220) and the cylindrical parabolic mirrors (20). Each cylindrical parabolic mirror (20) forms a shape in which a cylindrical paraboloid having curvature with respect to a sub-scanning direction (12) has been clipped by an axial plane that is perpendicular to the vertex of the cylindrical paraboloid in the main scanning direction (11). The LED arrays (220) are positioned in such a manner that the central axis in the light-emitting direction of the LED arrays (220) is perpendicular to the axial plane, and the focal position of the cylindrical paraboloid is contained in the light-emitting area of the LED arrays (220).

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