Visualization of High-Speed Phenomena Using Holographic Interferometry

Visualization of Wavefronts by High Frequency Ultrasonic Holographic Interferometry

Ultrasonic fields in glycerol are visualized by holographic interferometry with a phase-modulated reference beam. Fine particles suspended in glycerol are illuminated with sheetlike light, and the light scattered from the illuminated plane is recorded in a hologram. The ultrasonic field on the plane is displayed in the reconstructed image, which provides equiphase positions of the wave, i.e., w...

Visualization of ultrasonic wave interferometry fronts using holographic

Holographic interferometry with a phase-modulated reference beam is used to visualize a progressive ultrasonic wave in the interior of a transparent medium. The medium is illuminated with sheetlike light, and the light scattered from the plane of the light sheet is recorded in the hologram. The ultrasonic field on the plane is obtained from the reconstructed image, which provides the equiphase ...

High-speed imaging of sound using parallel phase-shifting interferometry.

Sound-field imaging, the visualization of spatial and temporal distribution of acoustical properties such as sound pressure, is useful for understanding acoustical phenomena. This study investigated the use of parallel phase-shifting interferometry (PPSI) with a high-speed polarization camera for imaging a sound field, particularly high-speed imaging of propagating sound waves. The experimental...

High-Density High-Speed Holographic Memory

An innovative holographic memory system has been developed at JPL for high-density and high-speed data storage in a space environment. This system utilizes a newly developed electro-optic (E-O) beam steering technology to achieve a design goal of up to 250 Gb storage in a cubic photorefractive crystal with up to 1 Gb/sec transfer rate. Recently, a compact CD-sized holographic memory breadboard ...

Incoherent Holographic Interferometry