【摘要】 <正> 夹层全息术(Sandwich Holography)是1974年提出的一种用于固体变形测量的新方法。它的特点是:两次曝光间由于振动等干扰引起的条纹,可以通过调节夹层全息图相对于参考光的方位几乎全部消除。同时还可以按需要调出任一方向上的背景条纹,其间距和方向都易于控制。对比双板技术来说,夹层全息技术的调节敏感度低得多,所以可以用较粗糙的调节机构达到与双板技术相同的调节的目的。显然这些特点在风洞测量中是很有用的。中国科学技术大学明海、更多还原

【Abstract】 Following problems are discussed in this report: 1) It is proved by analysis that the regulation sensitivity of sandwioh holography is much lower than that of double plate holography. 2) The dependence of regulation sensitivity on the parameters of optical path are given. 3) For reference plane wave, it is proved that there is no distortion of image as certain approximate conditions are satisfied. 4) It is indicated that both sandwich and double plate holography have inherent defect of additional error because of the optical inhomogeneities in the substrate of the holographic plates.更多还原