三温区溶质传输助熔剂法生长BaTiO_3晶体  

A New Method of Tolerating Rigid Body Motion for Digital Shearography

作　　者：徐军[1] 吴光照[1] 马笑山[1] 张新民[1] 邓佩珍[1] 

机构地区：[1]中国科学院上海光学精密机械研究所

出　　处：《光学学报》1995年第5期566-570,共5页Acta Optica Sinica

摘　　要：ＢａＴｉＯ３晶体新的生长方法，即感应加热三温区溶质传输熔剂法。其要点使高温熔体分为三个温区，坩埚顶部为生长区（Ａ区），温度最低，坩埚底部为溶解区（Ｃ区），温度高于生长区，营养料置于此区，坩埚中部为高温区（Ｂ区），在此区将杂晶熔解。还阐述了此法的机理，调试创造了稳定适宜的三温区温场。用此法生长出了优质ＳＴｉＯ３大单晶，尺寸达３０×３０×１５ｍｍ，并初步观测了其畴结构形貌，实验测定了晶格常数和居里点。One of the limitation of speckle correlation interferometric techniques including shearography is that the rigid Any motion yields decorrelation of speckle patterns before and after deformation which results in the deterioration of fringe visibility. This peper proposes a method which can effectively tolerate rigid they motion. It involves rearranging the recorded speckles before and after deformation in order to enlarge the speckle size, averaging speckles to improve the quality of fringe Patterns, and reconstructing fringe patterns and iteration of smooth to further suppress the speckle noise to obtain decent result.

关 键 词：助熔剂法 三温区 BATIO3晶体 溶质传输 

分 类 号：TN244[电子电信—物理电子学] O782[理学—晶体学]