7.5 ~ 9.7μm traditional wide band antireflective (AR) film is designed on ZnS, choosing Ge, ZnS and YF<sub>3</sub> as film material, and the average transmittance (<i>T</i>) could be elevated from 74.9% to 98% when AOI=0°. But while AOI=70°, <i>T</i> of <i>p</i> and <i>s</i> component is 85.9% and 75.6% separately, and the average transmittance is 80.8% because of the separation of <i>s-</i> and <i>p-</i>polarized light. Depolarization antireflective film is also designed with the same materials by equivalent-layer method to balance <i>s-</i> and <i>p-</i> component energy, and the polarization effect at different incident angles is analyzed. When AOI=0°, <i>T</i> is 99.3%, and when AOI=70°, <i>T</i> is 90.6%, 10% less than that of traditional AR film. So equivalent-layer method is effective to eliminate polarization effect of broadband antireflective coatings at large incident angle and then could effectively improve the optical performance, which is critical in precision guide system.
The luminescent properties of different M<sup>II</sup>
<sub>1-x</sub>Al<sub>2</sub>S<sub>4</sub>:Eu and M<sup>II</sup>Al<sub>2</sub>S<sub>4</sub>:Eu are researched in this paper. A novel
assessment method is used to evaluate these materials base on the configuration coordinates model. Vibronic coupling
parameters of these phosphor materials can be calculated by the formula. With the calculation of characteristic energy
and unitless factors, performances of M<sup>II</sup>
<sub>1-x</sub>Al<sub>2</sub>S<sub>4</sub>:Eu and M<sup>II</sup>Al<sub>2</sub>S<sub>4</sub>:Eu are evaluated. We then concluded that
BaAl<sub>2</sub>S<sub>4</sub>:Eu shows highest Φ value comparing with other single or complex thioaluminates. With increasing amounts of
Ba and Ca ions in the Ba<sub>x</sub>Mg<sub>1-x</sub>Al<sub>2</sub>S<sub>4</sub>:Eu and Ca<sub>1-y</sub>Sr<sub>y</sub>Al<sub>2</sub>S<sub>4</sub>:Eu respectively, the complex thioaluminates gives better
luminescent performance and a broad tunable emission color can be achieved.
Flexible flat panel display (FPD) is considered to be one of the most optimal and flourishing display technologies in the
21st century, and the processing and exploitation of flexible substrate is one of the key techniques of flexible display.
Until now there have been three choices of flexible substrate materials: (1) ultra-thin glass; (2) polymer materials; (3)
metal foils. The flexible substrates of electroluminescence display must endure high-temperature annealing from 400°C to
700°C for doping activation, and have good flexibility and can obstruct oxygen and water penetration. Based on above
considerations, to adopt the stainless steel foil for the FPD is the most suitable. In this paper, the electrolytic polishing
process of stainless steel foil is investigated, and the results of the experiment show that the polishing time, current
density, distance of cathode and anode panel, and other technical parameters affect the electrolytic polishing process, and
then induce the best technical parameters. The surface roughness of stainless steel sheet decreases from 0.12μm to
0.044μm, but the dongas appear after the steel surface being polished. The dongas patterns are investigated, and this
provides a more scientific basis for the experiments in the future.