Optical Design for Camera Module in Mobile Phones
| Autor: | Che Yuan Hsu, 許哲源 |
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| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 This thesis aims at a concrete design instance of a three-component camera lens with 1.3 mega pixels in mobile phones. The total length of this optical system must be within 7mm. Meanwhile, the back focal length must be long enough so that the IR cut-off filter and the cover glass of image sensor can be inserted before the imaging surface. First of all, suitable lens optical specifications are made according to that of CMOS image sensor. The initial structure of this design is based on a patent lens. By means of “scale lens” and “quick focus” functions of the optical design software ZEMAX, the Gaussian solution of the paraxial surface system is obtained. Drawing a diagram in which Seidel aberration and shape factors serve as axes, curvatures of every slice of thin lens can be acquired. After thickening the lens, a suitable spherical structure is achieved. At last, in order to improve system performance, optimizing skills are utilized, that is, to make the surfaces of every lens become aspherical. As a result, MTF achieves over thirty percents in the maximum spatial frequency. With these techniques, the consequence of this design becomes more practical. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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