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Introduction to Optical Holography, ., which is formed by an object wave and a reference wave coherent with it. The hologram, when illuminated with the reference wave, reproduces the same amplitude and phase distribution as that created by the object wave in the recording. Therefore, in accordance with the Huygens-Fresnel principle,
grounded
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Holographic Interferometry, one has been recorded on and reconstructed by a hologram. The principle of holographic interferometry is illustrated by Fig. 1.1 which displays a general arrangement for obtaining a hologram and reconstructing the wave recorded in it. As has been shown earlier, the interaction of the reconstructing
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发表于 2025-3-25 14:17:04
Optimization of Holographic Interferometers,urface of a strained body. There are three major approaches presently available to specify or improve the interferometer parameters, that minimize the errors in the displacement vector determination. The most widely used method is simply to compare the holographic results with values derived from ot
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发表于 2025-3-25 17:29:56
Determination of the Displacement-Vector Components,e displacement vector X., X. and X. of an arbitrary point on the surface of a strained object. The displacement vector components normal and tangential to the object surface, which are necessary for the analysis of the strained state can, in general, be derived by calculation, too. However, for plan
progestin
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Determination of Strain and Stress in an Elastic Body by Holographic Interferometry,s a body with a high rigidity, and its strain is linearly related to the displacement. The smallness of the deformation of a body also implies small displacements of its individual points. This allows interpretation of the holograms by means of the theory of elasticity which assumes the deformations
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彻底明白
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Motilin
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Holographic Studies of Vibrations, (Sect. 2.1.5) one can holograph moving objects. The hologram thus obtained provides information on the character of the object’s motion and changes in the object, in particular, on deformations suffered in the course of motion.
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吸引力
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Determination of the Displacement-Vector Components,e objects, the holographic interferometry is capable of recording individual components of the displacement vector as well. In this chapter we discuss the various methods for separate determination of the in-plane and out-of-plane displacements.