Diffraction grating produced by interfering ultrasonic waves
An ultrasonic grating is a type of diffraction grating[1] produced by the interference of ultrasonic waves in a medium, which alters the physical properties of the medium (and hence the refractive index) in a grid-like pattern. The term acoustic grating is a more general term that includes operation at audible frequencies.
An ultrasonic wave is a sound wave at a frequency greater than 20 kHz. The human ear cannot recognize ultrasonic waves, but animals such as bats and dogs can. Ultrasonic waves can be produced by the piezoelectric effect and magnetostriction.
^Kinoshita, S.; Yoshioka, S.; Miyazaki, J. (2008). "Physics of structural colors". Reports on Progress in Physics. 71 (7): 076401. Bibcode:2008RPPh...71g6401K. doi:10.1088/0034-4885/71/7/076401. S2CID 53068819.
and 22 Related for: Ultrasonic grating information
An ultrasonicgrating is a type of diffraction grating produced by the interference of ultrasonic waves in a medium, which alters the physical properties...
In optics, a diffraction grating is an optical grating with a periodic structure that diffracts light, or another type of electromagnetic radiation, into...
Considering first the generation of acoustic waves, an optical amplitude grating, illuminated by the a short pulse pump laser (typically ~1ns), is imaged...
upon the speed of light. For objects such as crystals and diffraction gratings, diffraction is used with X-rays and electron beams. Measurement techniques...
diffraction gratings, or by placing a narrow annular aperture in the far field. High order Bessel beams can be generated by spiral diffraction gratings. The...
phased array also finds applications in ultrasonic and medical imaging application (phased array ultrasonics) and in optics optical phased array. In a...
then the light goes through the sample to a dispersion array (diffraction grating instrument) and captured by a photodiode. For astronomical purposes, the...
single-crystalline diamond enough to replace silicon as a diffraction grating and window material in high-power radiation sources, such as synchrotrons...
battlefield communication and lenses for high-gain antennas, improving ultrasonic sensors, and even shielding structures from earthquakes. Metamaterials...
absorption enables the analysis with a specific wavelength for gases. Ultrasonic microscopy uses high frequency sound waves to image bonded interfaces...
is the principle behind, for example, 3-phase power and the diffraction grating. In both of these cases, the result is achieved by uniform spacing of the...
[page needed] In medical ultrasonography, the effect of grating lobes can be reduced by activating ultrasonic transducer elements using variable voltages in apodization...
JSTOR 3546476. Sowell, W. A. (1983). "The Bat's Ear as a Diffraction Grating" (PDF). Air Force Institute of Technology. Archived (PDF) from the original...
television set. In the 1960s, Adler modified the remote control to use ultrasonic signals, a technology which went on to be used in television sets manufactured...
surfaces and connecting plates for directional control valves Active DIN 24537 Welding, Warping valves; Steel Grating Floor Standard control valves Active...
first VING was in 2007 with a counter electrode with the periodic surface grating resembling the arrays of the AFM tip as a moving electrode. Since the counter...
inspection Inspecting a thruster grating Core-drilling coral Lifting bags Placing concrete underwater Inspecting an intake grating ROV working on a subsea structure...
degrees of intensity, with the feather structure acting as a diffraction grating. Iridescent hummingbird colors result from a combination of refraction...
original 21 events in Cuba were characterized as starting with strange grating noises coming from a specific direction. Some people experienced pressure...
manipulate small particles was first reported in the 1982 research article "Ultrasonic Inspection of Fiber Suspensions". In a standing acoustic field, objects...
\omega \tau } should be limited to ± π {\displaystyle \pm \pi } to avoid grating waves. It means that for angle of arrival θ {\displaystyle \theta } in...
Global Information