| Summary: | 碩士 === 國立臺北科技大學 === 光電工程系所 === 94 === With the enlargement of cell phone’s market, the requirements for pint-size fix focus lens increase day by day. This research designs the optical lens for the grade of 3 mega-pixel mobile phone camera. The object of this design is to construct a lens for cell phone with image quality as the digital still camera.
This research uses power structure with four lenses to design cell phones’ lenses with high-quality of images. The research, at 1st order optical system, starts to analyze power structure which regards power’s distribution as reference of design. In addition, this research also mentions that the structure of (+-+-) is the form which has the highest practicability. In order to lower production costs, we can use two pieces of spherical glass and two aspherical plastic lenses. In that way, when we want to maintain certain quality, we also can reduce the chromatic aberration, reduce the number of using lenses, and shorten the length of lenses module to achieve the requirement of thinness and shortness. The features of lens are as follows: First, its total length of system is less than 7.8mm. Second, no matter from tangential line or sagittal line of image, the MTF is higher than 30% under 230 lp/mm. Last, the quality of distortion is less than 2%.
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