In addition, the digital micro/nanomoire method using a digital
grating as the reference
grating has also been applied to measure micro/nanodeformation [15, 16].
In general, diffraction
gratings with a lamellar configuration consist of a periodically varying boundary of the period P between two different media with refractive indices [n.sub.0] and [n.sub.i] as illustrated in Figure 1, where filling factor F, depth D, wavelength [lambda] and incident angle [[theta].sub.i] and [[theta].sub.m] the mth order diffraction angle, respectively.
Two complementary
gratings are obtained when light polymerizes the monomer.
Shimadzu Corporation will produce customized
gratings in accordance to customer requests for specific coating properties, and substrate and external shapes, for the production of
gratings with the desired, highly specific characteristics.
The work, published in Science, uses diffraction
gratings with dielectric metasurfaces, in which the nanoscale structures on the surface of the
gratings give tuneable polarisation control.
Products using labels decorated with diffraction
gratings will generate strong visual interest on retial shelves versus non-decorated lables.
The spectrograph's diffractions
gratings are from holographic masters, and their laminar groove profile provides a useful feature.
Inprentus has developed the capability to mechanically rule blazed diffraction
gratings with blaze angles below 0.2 degrees.
Asokan, "Dual functional performance of fiber Bragg
gratings coated with metals using flash evaporation technique," Optical Fiber Technology, vol.
Since the
gratings in the work are fabricated by two-beam interference, the spatial distributions of refractive index and transmittance in the
gratings can be expressed by a sinusoidal function.
A large part of these works is dedicated to decrease reflection at the multiple interfaces of the PV module: most of these structures involve submicrometric patterns, such as diffraction
gratings [1-5].
In recent years, a series of solutions were proposed for solving Fiber Bragg
Grating strain and temperature cross-sensitive issues, such as the adjacent double
grating method [8], Long-period
gratings and FBG bonding method [9], different cladding diameter fiber
grating method [10], and birefringence distributed feedback (DFB) laser cavity method [11] from different applicable level; but these kinds of methods are not able to solve measurement accuracy problem about the Fiber Bragg
Grating Strain Sensor used in coal mine tunnel roof rock deformation detection.
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