排序方式: 共有15条查询结果,搜索用时 15 毫秒
1.
本文介绍激光散斑在光学信息处理中的应用,着重讨论了图象差异的提取和图象多通道技术的原理和实验,最后描述了一种利用相关散斑图测定光学传递函数的方法。 相似文献
2.
本文介绍激光散斑照相在工程测量中的若干应用。我们从布什和托卡斯基的基础实验出发,着重讨论了位移或形变的检测、物体振动的研究,确定物体横向运动的轨迹以及测定表面粗糙度的散斑方法。最后对这些方法的优点和适用范围作扼要地评述。 相似文献
3.
4.
5.
6.
7.
8.
9.
The digital holography with single phase-shifting operation has been studied. Experimental results and computer-simulated work are presented. The phase-shifting error makes the intensity of primary image decrease and the conjugate image appear in reconstruction. The explicit equation for explaining these effects is given. The calculation of the normalized intercorrelation peak between the input and the reconstruction for different algorithms shows that, when the phase-shifting operation is the main error source, the quality of the image reconstructed from the digital holography with single phase-shifting operation is favorable. 相似文献
10.
Low frequency modes were observed in a series of alkali halides doped with lead after X-irradiation at 77K. The peak positions of the Raman signals are at 34cm-1 for NaCl:Pb2+, 30cm-1 for KCl:Pb2+,28cm-1 for RbCl:Pb2+ and 22cm-1 for KBr:Pb2+. They are assigned to the inelastic light scattering caused by the local vibration of X-i (Pb+) center, which consists of an interstitial halogen ion stabilized by a substitutional ion Pb+ . Polarized Raman measurements and Behavior Typer(BT) analysis show that the symmetry of the X-i (Pb+) center belongs to the point group C3v A structure model of the X-i (Pb+) center is proposed based on the Raman data and the result of BT analysis. 相似文献