Space Of Colloidal Crystal Growth Experiment Device Key Technologies

The colloidal crystal (CC) is an ordered array of sub micro or nano particles, analogous to a atomic crystal. In the past three decades, there are two reasons that CC is one of the hotspots in the condense matter. Firstly, the observable space and time in the disorder phase transition of CC are several orders in magnitude greater than that of atomic crystals. Secondly, CC can be made of photon crystal, which has the particular optical property. Furthermore, the photon crystals can promote the development of photonic devices related to many fields, such as microwave communication, filter technique and invisible technology.Because the elastic modulus of CC is weak, gravity has important influence in the crystal growth. The study of the effects of gravity on the colloidal crystallization can be preceded in a long-term micro gravity environment. Kossel diffraction image faithfully reflects three-dimensional information on the symmetry of CC. We will be the first in the world to study CC by Kossel diffraction method in the space environment of micro gravity. In this dissertation, we focus on the key technology of manufacture space for the apparatus of colloidal crystal experimental. The main contributions are as follows:1. We obtain high resolution diffraction and form images of three specimens by remote control. All Kossel line image systems require manual operation at present. We set up high resolution diffraction Kossel line image systems by remote control for the first time. High resolution CCD is capable of distinguishing the 0.5 degree variation with angle of diffraction. In order to strengthen reliability of the space experiments, we use two laser devices in our systems and devise the light path to coordinate them. In addition, we can switch observation diffraction and morphological images of three specimens by a transposition mechanism in the apparatus.2. We propose and realize an algorithm of diffraction image enhancement with Kossel line for CC. The diffraction images of CC have the low contrast ratio, and the efficient information of Kossel line is not distinct enough due to transmission imaging approach. We propose the algorithm, firstly, which emphasizes and doesn't change proficient information of Kossel line. The algorithm provides competent support for the structural analysis of CC.3. A high precision control method for experimental temperature of the multiple specimen of CC is proposed. The method in accordance with three kinds of specimen cells is studied. The control error is less than±0.1℃,which achieves the most accurate system. This temperature control method satisfies the requirement of space experiments. The transformation of diffraction and images with different temperatures are obtained on the ground.4. The apparatus is provided with flexible functions of remote control. Its operating modes are easy to switch by six bus load instructions, and the experiment parameters can be modulated easily by nine data input. The experiment apparatus can satisfy the requirement of space experiments'assignments. The flexible operation of the apparatus is better than the previous devices of the space experiment.