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
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 , Long-period gratings
and FBG bonding method , different cladding diameter fiber grating
method , and birefringence distributed feedback (DFB) laser cavity method  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.