This paper concerns on the Optical Transfer Function (OTF) of confocal fluorescent microscope in laser scanning microarray system. The cut-off of confocal microscopy, the lateral and the lognitudinal resolution, and the relationship of pinhole and resolution were discussed in a novel method. At the same time, all of these parameters of confocal microscope in microarray system are compared with other conventional and coherent microscope. The results obtained in this paper are significant for selecting the appropriate parameters and evaluating the properties of a confocal scanning fluorescent microscope for microarray reader system in order to improve the performance.
The phase distribution design process of the pure phase element (PPE) used for quasi-annular beam shaping is introduced in this paper. A new optimization algorithm named Quasi-Gradient Descent (Quasi-GD) algorithm has been developed and used here to meet such design requirement. With a more restrictive sampling mode named precise sampling in the optimization, the simulated result shows that the uniformity of energy distribution on the focal plane is invariant with different sampling intervals and the true beam shaping effect is achieved.
We have presented a special color film with negative optical-birefringence. It can work as color filter and viewing angle extension film of Normally White Twist Nematic Liquid Crystal Displays (NW TN-LCDs). To fabricate such film we synthesized oil-soluble high-performance polyimide (PI) which can be dissolved in the usual organic solvent and shows negative birefringence after lamination. Mixing PI with certain pigment of green, blue and red color in the solvent with suitable proportion individually and laminating on the glass substrate, we obtained color films of good transmission spectrum and suitable chromatic coordinates. The experimental results show that the color filter can work as compensation films of NW TN-LCDs.
The image-sticking caused by the asymmetry and shift of current-voltage (I-V) characteristics of the MIM element is a big problem in MIM-LCD. The I-V characteristics couldn't be described accurately and comprehensively by conventional Poole-Frenkel equation, so it is difficult to estimate and optimize various parameters to solve the problems, which means the optimization of the parameters requires many experiments with much effort. In this article, considering the effect of the two interface layers which exist between the two electrodes and the intermediate layer, we introduce a p-n-n+ band model. Using this model, we can explain the reason of the asymmetry and why it is easier to produce Poole-Frenkel effect from the top-electrode to the bottom- electrode than it does on the opposite direction. Meanwhile, we propose that using the weaker electronegative metal as top-electrode or using the sputtered tantalum oxide instead of the anodized tantalum oxides as insulator layer can solve the problem.
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