对硅酸铋晶体实时自动记录信息的研究

RESEARCH ON AUTOMATIC REAL-TIME INFORMATION RECORDS IN BSO CRYSTAL

从原理与实验两方面论述了硅酸铅（Ｂｉ＿（１２）ＳｉＯ＿（２０））晶体实时自动记录、显影光学信息的特性。其灵敏度比铌酸锂（ＬｉＮｂＯ＿３）晶体高１００倍。实验表明，在晶体上施加约为６ｋＶ·ｃｍ￣（－１）的横向电场和１５×１０￣５Ｐａ的横向气压，可进一步提高灵敏度。作为实例，用硅酸铅晶体和微机控制的全息装置，实时自动地测试了薄板受力后的变形。

The characterist ics of automatic real-time recording and developing optical information for BSO(Bi_(12)Si_(20)) crystal are discussed theoretically and experimentally. Sensitivity in recording is one hundred timeshigher than that for LNO( LiNbO_3)cryxtal.Experiments show that a transverse electric field of 6kV/cm and atransverse atmospheric pressure of 15×10￣5 pa should be applied to BSO crystal in order to increase the sensitivity,As a practical example,with BSO crystal and holographic device controlled by a computer,the deformationof a sheet metal under force was measured autornatically in real-time.