On the right side of this equation, the first item is the spectrum of the zero-order diffracted wave
, the second is the spectrum of the object wave which is modulated by the reference wave and translated to the point (-[[theta].sub.x]/T, -[[theta].sub.y]/T) relative to the center of the spectrum plane, and the third is the spectrum of the conjugate object wave.
and the echo wave are physical phenomenon.
The relation between the incident wave and the diffracted wave
is one-to-many, while the relation between the incident wave and the reflected wave is that one-to-one, as shown in Figure 1.
For both (7) and (9), the Fast Fourier Transform (FFT) algorithm can be implemented and the diffracted wave
can therefore be computed very efficiently.
The PO scattered fields could be represented as the surface integrals, while the diffracted wave
fields from the ILDC technique could be represented as line integrals.
By understanding the mechanics of wave diffraction, a designer can properly prevent diffracted wave
energy from causing significant agitation within the shadow zone .
where [[bar.E].sub.d]--field intensity of diffracted wave
, [[bar.E].sub.rr]--field intensity of double-reflected wave.
In medium II, the reflection grating, we will assume the existence of the zero-order diffracted wave
and the first-order diffractive wave given, respectively, by the following:
To express the diffracted wave
field (for pressure and displacement, resp.) in the fluid due to the source impacting the elastic medium, we propose the use of the following integral representation:
At the same time, in the case of sliding non-complanar diffraction the amplitude of the diffracted wave
is modulated by the factors which take into account the refraction of the diffraction wave at the crystal-vacuum interface and mirror reflection.