Fabrication,Structure and Optical Properties of Zr~(4+) Doped Ba(Mg,Ta) O_3 Transparent Ceramics with High Refractive Index

Novel transparent ceramics of Zr4+ doped Ba(Mg,Ta)O3(BMT)with a high refractive index of 2.037 at 587.56 nm were successfully fabricated via high temperature solid-state-reaction sintering method.To make it transparent,the pure cubic Ba(Zr,Mg,Ta)O3 phases(BZMT)were realized in advance by skillfully modulating the lattice structure of BMT from trigonal symmetric to cubic symmetric through doping Zr4+ into the lattice of BMT crystal.Highly optical transmittance of 74% at 650 n,,which hit the upper limit of the theory,was achieved for BZMT.Both abbe number of 23.4 and the bandgap Eg of 3.22 eV have been calculated.     

铝塑包装机中胶囊的红外气动在线有序排列

利用两对光电对管对胶囊的体帽局部红外图像特征信息进行了提取和识别。将体现胶囊体帽微小几何尺寸差别特征的弱模拟信号转变成数字信号,提高了检测的准确率,增强了抗干扰能力。根据射流附壁效应,设计了具有流线型结构的胶囊滑道及胶囊气动加速翻转机构,提高了胶囊翻转速率及准确率,实现胶囊体帽方向的调整。     

200 mJ半导体端面泵浦MOPA激光器研究

采用高功率激光二极管阵列(LDA)端面泵浦Nd:YAG激光棒方式, 结合凸凹非稳腔的设计，获得20 Hz运转条件下小束散角激光输出平均能量约为83 mJ。以该激光为振荡源，同样采用LDA端面泵浦Nd:YAG激光棒的方式进行能量放大，组成LDA端面泵浦振荡-放大(MOPA)激光器，最终获得重频频率20 Hz、平均能量＞200 mJ、发散角＜2.1 mrad、能量波动＜±2.5%的脉冲激光输出。该激光器光光转换效率约为14.6%，体积为175×91×49 mm3，质量＜1 kg，激光经8倍发射天线后发散角＜0.3 mrad。