Search results
Results from the WOW.Com Content Network
In principle, it is possible to make a hologram for any wave. Electron holography is the application of holography techniques to electron waves rather than light waves. Electron holography was invented by Dennis Gabor to improve the resolution and avoid the aberrations of the transmission electron microscope .
Embossed holograms are used widely on credit cards, banknotes, and high value products for authentication purposes. [3] It is possible to print holograms directly into steel using a sheet explosive charge to create the required surface relief. [15] The Royal Canadian Mint produces holographic gold and silver coinage through a complex stamping ...
Computer-generated holography (CGH) is a technique that uses computer algorithms to generate holograms.It involves generating holographic interference patterns.A computer-generated hologram can be displayed on a dynamic holographic display, or it can be printed onto a mask or film using lithography. [1]
Ordinary holograms are three-dimensional images encoded in a two-dimensional surface, such as the hologram on a typical credit card. "This time, the entire universe is encoded," he said.
Since its introduction, vibrometry by holographic interferometry has become commonplace. Powell and Stetson have shown that the fringes of the time-averaged hologram of a vibrating object correspond to the zeros of the Bessel function (), where (,) is the modulation depth of the phase modulation of the optical field at , on the object. [1]
Solid holograms appear many times in the TV show Star Trek. [ 7 ] [ 8 ] In Red Dwarf , the character Rimmer is a hologram who obtains a "hard light drive", allowing him to become tangible. [ 7 ] In the animated show Steven Universe , several main characters are aliens who have physical forms made out of light, with a gemstone as the only ...
Staging a fashion show is daunting under normal circumstances but doing so during the shutdown opened up new possibilities for some Lynn University students. Digital mapping, holograms and new ...
Digital holography is the acquisition and processing of holograms with a digital sensor array, [1] [2] typically a CCD camera or a similar device. Image rendering, or reconstruction of object data is performed numerically from digitized interferograms.