| Summary: | 碩士 === 國立臺北科技大學 === 光電與平面顯示器產業研發碩士專班 === 96 === 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.
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