Preparation And Performance Research On Acid-leaching Method Firber Material And Imaging Bundles

Optical fiber bundle prepared with the acid leaching method has many advantages, such as thin single fiber diameter, softness, high resolution, big numerical aperture, clear imaging, so it is one of activity research topics in the photo electricity function material and fiber optics research field and its products have broad application prospects in the varieties of high resolution fiber imaging devices and industry auto detection fields.The dissertation started with the fiber optics' basic theory, discussed the principles of the light and image transmission in the optical fiber bundle with the geometrical optics method, analyzed the transmitting rules of the fiber bundle and its discrete imaging generally and systemically combined with two-dimension integral sample theorem, determined the three-layer coaxial structure of the acidic single fiber based on the fiber waveguide effect and light-transfer total internal reflection condition.The dissertation carried out a thorough study on influences which the material composition has on the optical fiber host glass structure, analyzed the host glass network configuration evolution and various performance alteration reason which are caused by the ingredient alternations and researched systematically the fiber host glass formation regularities and the relationship between its optics characteristics, thermodynamics characteristics, chemistry stabilities and its chemistry ingredients. The glass material samples of fiber core, cladding and acidic layer are prepared with the hyperthermia fusion method.The optical fiber host glass material samples are attributed with the modern measurements of DSC and infrared spectrum and simultaneously the three host glass materials are matching designed to determine the recipes of high quality core, cladding and acidic layer which can meet the physic-chemical performances and the fiber glass rod and tube combination materials which can meet the coaxial requirements are prepared.The mono-filament and multi-filament are drawn with the rod-tube method to determine the optimal drawing temperature is 580±0.2℃. The drawing experiments showed that the temperature fluctuation of the drawing unit must be less than 0.2℃and the drawing temperature should be less than the crystallization upper temperature of above 40℃-50℃to make sure that the drawing operations will not be influenced by the crystallization and split-phase and the mono-filament fiber geometry is uniform and perfect. Beam concentration technology is one of the important parts for preparing the high resolution optical fiber imaging bundle. On the static sampling condition that packing factor and limit resolution of the regular hexagon arrangement imaging bundle are increased by 1.15 times than that of square arrangement bundle. So the regular hexagon arrangement is adopted to improve the resolution of the imaging bundle.In the dissertation, the technology factors for preparing the heavy-section fiber imaging bundle with the lamination adhesion method and hot-melting method were analyzed in depth. various sections fiber imaging bundles whose operation unit is multi-filament and whose image-carrying unit is 8μm-diametral fiber mono-filament with the resolution higher than 50.01p/mm are prepared successfully with multi-filament direct lamination adhesion technology and heat-melting technology through improving and innovating the two technology parameters and scheme.The dissertation determined series of technology parameters suitable for the hard fiber imaging acid through the research on the acid types, concentration, acid solution temperature and time. The acid solution rate is highest and the effect is best when the mixed acid solution (HCI+HNO3) of low concentration is employed and the acid solution temperature range is 35℃-40℃. Those played an important part in decreasing the wire-broken rate and cross rate of the imaging and improving the imaging quality.The dissertation carried out a further study on the main factors for influencing the imaging quality of the flexibility fiber imaging bundle, analyzed the dark silk genetic and variable regularity and proposed settle methods and effective measures for improving the imaging bundle quality. Then the flexibility fiber imaging bundle is detected and evaluated. The flexibility fiber imaging bundles of different sections are get by experiments whose mono-filament diameter is 8±0.01μm. resolution is 50.01p/mm-57.51p/mm, visible light penetrated rate is higher than 39.7%/m and numerical aperture is greater than 0.60.The dissertation proposed several effective methods for improving the imaging bundle optical performance and optimal matching relationship among the technology parameters through the amounts of experiments and theory analyses. The optical fiber imaging bundle preparing technology and its theory research system are formed and which will guide the wide application of the fiber imaging bundles and technology innovation of the products.