线阵声全息非均匀取样成像

LINEAR-ARRAYED ACOUSTICAL HOLOGRAPHY WITH UNEQUALLY SPACED SAMPLING

摘要: 本文给出了用非均匀取样方法获得的重建像,对其成像特性进行了理论分析。非均匀取样成像具有使主像清晰高阶像散焦的优点,对观察和识别目标有利,较同样取样数的均匀取样成像方式好。非均匀取样成像对各种取样成像系统取样方式的选择都具有参考价值。

Abstract: This paper gives out the reconstruction of images with by linear-arrayed acoustical holography unequal spaced sampling and theoretically analyeses characteristics of the resulted image.The unequally spaced sampling enhances the main image and makes the high-order image rather blur.Thus it makes the identification of objects easier than that does with equal spaced sampling.Unequally spaced sampling is also useful in other forms of imaging system besides acoustical holography.