Advancement of Optical Methods in Experimental Mechanics, by Helena Jin, Cesar Sciammarella, Sanichiro Yoshida, Luciano

By Helena Jin, Cesar Sciammarella, Sanichiro Yoshida, Luciano Lamberti

Advancement of Optical tools in Experimental Mechanics, quantity three: lawsuits of the 2014 Annual convention on Experimental and utilized Mechanics, the 3rd quantity of 8 from the convention, brings jointly contributions to this significant zone of study and engineering. the gathering provides early findings and case experiences on quite a lot of optical tools starting from conventional photoelasticity and interferometry to more moderen DIC and DVC strategies, and contains papers within the following common technical learn areas:

· complex optical equipment for frontier applications

· complicated optical interferometry

· Optical dimension platforms utilizing polarized light

· Optical tools for complex production

· electronic picture correlation

· Optical equipment on the micro/nano-scale

· third-dimensional imaging and volumetric correlation

· Imaging tools for thermomechanics applications

· Opto-acoustical equipment in experimental mechanics

· Optical measurements in hard environments

· Optical tools for inverse problems

· Advances in optical methods

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Extra info for Advancement of Optical Methods in Experimental Mechanics, Volume 3: Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics

Sample text

This means that the surface under analysis will be illuminated by a number of plane wave fronts. A number of diffraction orders are generated that depend on the properties of the grating. Although the theoretical computation of these orders is extremely difficult, they can be experimentally recorded as it is shown in Fig. 10. The increasing orders contain the same information but with higher sensitivity because they correspond to higher frequencies. 15 shows a magnified view of the orders 1 and 2 of Fig.

Computing the modulus of the component kz of the k vector (see Fig. 1b) one arrives to the conclusion that this component oscillates with spatial frequencies 2p/lez much higher than the spatial oscillation of all ordinary electromagnetic waves, lez is the wavelength of a super oscillatory field. Berry [22] showed that such a field is a super-oscillatory field that through scattering in a medium can be transformed into an actual near field. This approach leads to the near-field microscopic detection that is well documented in the literature.

10 3 Topography of Rough Dielectric Surfaces Utilizing Evanescent Illumination 33 Fig. 16 (a) Phases of carrier fringes fc and modulated carrier fmc; (b) 2nd order polynomial data fitting corresponding to first and second harmonics In Eq. 17), pcn refers to the pitch while the subscript n indicates the particular analyzed order n (projected grating). Furthermore, Cn ðx; yÞ ¼ 2pf mfn ðyÞx ð3:18Þ In Eq. 18), Cn is the modulating function and fmfn is the frequency of the modulating function for a given order n (in this particular case, actual observed orders 1 and 2).

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