Scanner and designing method of scanning module in scanner

A scanner is composed of casing, scan platform, sean module moving in scanning direction, driver and linear pilot unit. Said scanning module consists of a casing with a long edge shorter than the length of scan platform perpendicular to scanning direction, a divergent light source, multiple reflector, a lens and an image sensor. Its advantages are small size, light weight, optimal scanned area and low cost. 一种扫描仪，主要具有一外壳、一扫描平台、一扫描模块、一驱动装置以及一线性导引机构。另外，扫描模块由一模块壳体、一发散式灯源、多个反射镜片、一镜头以及一影像传感器所组成，且扫描模块沿着一扫描方向移动，其中模块壳体具有一长边，而长边的长度小于扫描平台垂直于扫描方向的长度，且发散式灯源的长度可小于等于长边的长度。如此可设计一小型化、轻量化的扫描模块，进而减少物料成本，且不会影响可供扫描文件的扫描线长度以及扫描平台的尺寸。另外，扫描平台的面积也可达到最佳化的利用。