Reference Waves in Synthesized Acoustical Holograms
نویسندگان
چکیده
منابع مشابه
Remote Acoustical Mine Neutralization Using Back-Propagated Shock Waves
LONG-TERM GOALS The feasibility of using focused shock waves for mine neutralization requires detailed understanding of nonlinear wave propagation in water. This project investigates several fundamental issues of nonlinear acoustics when the primary source configuration is a discrete array of intense sources. Questions addressed through the theoretical analysis and an experimental effort concer...
متن کاملExperimental observation of azimuthal shock waves on nonlinear acoustical vortices
Thanks to a new focused array of piezoelectric transducers, experimental results are reported here to evidence helical acoustical shock waves resulting from the nonlinear propagation of acoustical vortices (AVs). These shock waves have a three-dimensional spiral shape, from which both the longitudinal and azimuthal components are studied. The inverse filter technique used to synthesize AVs allo...
متن کاملNew Creation Algorithm for Digitally Synthesized Holograms in Surface Model by Diffraction from Tilted Planes
Novel method for synthesizing light waves from objects expressed in surface model is presented for fast creation of digitally synthetic holograms. This method has a feature of coordinates rotation in Fourier domain, in which only twice FFTs and an interpolation of spectrum are necessary for calculation of light waves from each object’s plane. Therefore, presented method is rather faster than co...
متن کاملMultiple-viewpoint projection holograms synthesized by spatially incoherent correlation with broadband functions.
We present a theoretical framework for recording and reconstructing incoherent correlation holograms of real-existing three-dimensional scenes observed from multiple viewpoints. This framework is demonstrated by generating and reconstructing a modified Fresnel hologram as well as a new correlation hologram called a protected correlation hologram. The reconstructed scene obtained from the protec...
متن کاملComputer-generated holograms of three-dimensional objects synthesized from their multiple angular viewpoints.
Synthesizing computer-generated holograms (CGHs) of a general three-dimensional (3D) object is usually a heavy computational task. We propose and demonstrate a new algorithm for computing CGHs of 3D objects. In our scheme, many different angular projections of computer-designed 3D objects are numerically processed to yield a single two-dimensional complex matrix. This matrix is equivalent to th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1967
ISSN: 0001-4966
DOI: 10.1121/1.2143988