| Summary: | 碩士 === 國立交通大學 === 光電工程所 === 89 === In order to enhance the functions and compactness of the optical elements for the applications to integrated optics devices, we propose a different type of hybrid optical elements. It is consist of diffractive optical elements and a gradient-index(GRIN) distribution elements1. We have designed several hybrid elements with surface relief diffractive optical elements, such as gratings, a Fresnel lens, and CGH(computer-generation-hologram), and one-dimension GRIN distribution element or a two-dimension GRIN lens. Then we analyze these different hybrid optical elements with rigorous coupled-wave theory, ray-tracing method, and Huygens-Fresnel diffraction theory. Besides, we compare the performance of these hybrid optical elements with those of an individual element and other conventional hybrid optical elements based on simulation results. Moreover, for best performances, we find out the conditions for the optimum optical designs and the practicability to fabricating optical elements. As a conclusion, these hybrid optical elements are functional, compact, and possible to optimize optical design for some applications. In other words, such kind of hybrid elements will be suitable for more applications.
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