摘要
一般傳統的接觸式影像感測器CIS (Contact Image Sensor) 中，主要的零組件有光源 （Light Source），光機構 (包含導光元件) 與折射率漸變柱狀透鏡 (Gradient Index Lens) 陣列及感光元件陣列 (CMOS)，三種基本的元件所組成。當光源照射到需掃描的文件，光線入射至文件使光線散射或反射後，經過光機構進而投射至感光元件陣列成像，此時感光元件陣列上即可得到文件上的影像。在此架構下，光機構扮演著重要的腳色，如何取得良好的影像主要取決於光機構的設計。另外，整個模組的體積也決定於光機構的大小。因此，只要可以將光機構移除，其整個模組的體積將隨之縮小。同時也因少了光機構此一元件，而使得生產的成本得以降低。本文將利用一種新的掃描技術來達到此一目的，此技術主要元件為光源及感光元件，主要是利用光源照射到所需掃描的文件，由文件產生散射光至感光元件接收即可取得影像，其影像的品質並不遜於含有光機構的影像感測器。
並列摘要
In general, the traditional contact-type image sensor is composed of light source, and opto-mechanical devices and CMOS device that opto- mechanical device includes light-guide, gradient index lens array. When the light source illuminates the document which is needed to be scanned, and makes the light is scattered or reflected by the document. The image of the document will be imaged on the sensor array through the opto-mechanical device. Then, the image of the document can be obtained by the sensor array. The design of the opto-mechanical device will dominate the image quality. The opto-mechanical device plays an important role in this system. In addition, the volume depends on the size of the opto-mechanical device. Therefore, if the opto-mechanical device is removed from the scanning system, not only the volume can be reduced but also the production cost can be lowered. In this research, a new scanning method is developed to achieve this purpose. Light source and sensor are both the main devices in this new scanning method. In this method, the image will be captured by the image sensor by means of diffraction which quality is no less poor than the image sensor consisting of the opto-mechanical device.