实时全息用于强发光等离子体诊断的优势

Advantage of real-time holography used in diagnostic research of plasma radiating violently

为解决发光强、谱线宽、变化快等恶劣条件下进行现场显示实验的困难 ,基于作者的实验研究和理论分析 ,着重讨论了激光实时全息中的光强配合和全息光栅干涉滤波。指出除选频、检偏及空间滤波外 ,引入阶梯吸收板 ,适当调配物、参光的比例 ,尤其是干涉项的变通选用 ,可有效滤除干扰光、实时再现位相场分布、保证干涉图的质量 ,使实时全息仍可用于 Z- pinch(Z箍缩 )、DPF(稠密等离子体焦点 )等发光较强的高激发、高电离等离子体状态及迅变过程的诊断研究 ,且颇具优势。

In light of the practical difficulties of tests with strong and band wide radiating and progressing swiftly, based on author's theoretical analysis and experimental investigation, this paper discussed the light intensity matching and interferential filtering with holo grating in laser real time holography and pointed out, in addition to the band passing, polarity checking and space coordinating filtrations, that the suitable allocation of ratio between object beam and reference beam by means of the introduction of the gradual light absorbing plate and in particular the proper selection of the interference terms can get the jamming light off, reconstruct the phase field distributing on real time and guarantee quality of interferogram and, make the application of real time holometry become feasible and flexible and have rather advantage to the diagnostic research of the progressing states of high temperature dense plasmas such as Z pinch and DPF, whose strong radiation with high exciting and high ionizing presents numerous difficulties as performing the ordinary optical and holographic tests.