Making Big Spherical Symmetry GRIN Micro-Sphere By Suspension-Diffusion-Copolymerization

Micro-lenses with a spherical gradient index (GRIN) are a new kind of optical device. Their optical properties are chiefly depending on their non-uniform index distributions. There are many merits about them. It has such advantages — simple geometric shape, small volume, short optical path, lightness in weight, easiness in producing by wholesale, etc. It has great potentialities in such fields as micro-optics, integrated optics and optics communication. Firstly, based on the basic theory of GRIN optics the optical effects of the spherical symmetry GRIN micro-sphere lens were analyzed systematically. Firstly, based on the basic theory of GRIN optics the optical effects of the spherical symmetry GRIN micro-sphere lens were analyzed systematically. Then two suitable monomers were selected to fabricate GRIN micro-sphere lens by suspension-diffusion-copolymerization method. Finally, the refractive index distribution curve and other optic parameters of the micro-lens were measured.Main contents as followed:Chapter 1: Simply introduce the background knowledge of gradient index optics, micro-optics and polymer gradient index material. Besides, elaborate the contents and significance of the research.Chapter 2: Expatiate on the basic theory of the GRIN micro-sphere-lens, especially on the classical model—MAXWELL fisheye lens, which demonstrates their excellent optical properties.Chapter 3: Simply introduced the concept of retro-reflection, retro-reflection materials, the fabrication of traditional glass sphere and the possibility of the application of GRIN polymer micro-sphere on retro-reflection. We compare the two on their retro-reflection performance, and draw a conclusion that Maxwell Fish-eye micro-sphere can not only reduce the extortionate need on refractive index of material but laso clearly enhance the retro-reflection efficiency.Chapter 4: Elaborate the theoretics of making polymer GRIN micro-lens by means of suspension-diffusion-copolymerization, inlude monomer selection, the process of suspension-diffusion-copolymerization and the improvement of process contiton.Emphasize on the way and result of using shearing interferometric technique to measure the refractive index distribution curve of the micro-lens.Chapter 5: Sum up the achievements we made, the problems still existing andthe work we should do in the future.