Latest Holography Stories
When photographers zoom in on an object to see it better, they lose the wide-angle perspective -- they are forced to trade off "big picture" context for detail. But now an imaging method developed by Princeton researchers could lead to lenses that show all parts of the scene at once in the same high detail. The new method could help build more powerful microscopes and other optical devices."It allows you to take a closer look at an object without narrowing your field of...
Storing information in electron wavesStanford researchers have reclaimed bragging rights for creating the world's smallest writing, a distinction the university first gained in 1985 and lost in 1990.How small is the writing? The letters in the words are assembled from subatomic sized bits as small as 0.3 nanometers, or roughly one third of a billionth of a meter.The researchers encoded the letters "S" and "U" (as in Stanford University) within the interference patterns...
Researchers at Purdue University have developed a technique that uses a laser and holograms to precisely position numerous tiny particles within seconds, representing a potential new tool to analyze biological samples or create devices using nanoassembly.The technique, called rapid electrokinetic patterning, is a potential alternative to existing technologies because the patterns can be more quickly and easily changed, said mechanical engineering doctoral student Stuart J. Williams."It's...
What could be in store for the future of in-home television? Researchers say it may be holographic 3-D television. Earlier this year researchers at the University of Arizona discovered a breakthrough in rewritable and erasable holographic systems.Dr Nasser Peyghambarian, chair of photonics and lasers at the university's Optical Sciences department, said scientists have broken a barrier by making the first updatable three-dimensional displays with memory."This is a prerequisite for any...
The pinhole camera, a technique known since ancient times, has inspired a futuristic technology for lensless, three-dimensional imaging. Working at both the Advanced Light Source (ALS) at the U.S. Department of Energy's Lawrence Berkeley National Laboratory, and at FLASH, the free-electron laser in Hamburg, Germany, an international group of scientists has produced two of the brightest, sharpest x-ray holograms of microscopic objects ever made, thousands of times more efficiently than...
Possible applications of technology widespreadTechnology invented by scientists from The Johns Hopkins University and Ben-Gurion University of the Negev can make three-dimensional imaging quicker, easier, less expensive and more accurate, the researchers said.This new technology, dubbed FINCH, for Fresnel incoherent correlation holography, could have implications in medical applications such as endoscopy, ophthalmology, CT scanning, X-ray imaging and ultrasounds, co-inventor Gary Brooker...
University of Arizona optical scientists have broken a technological barrier by making three-dimensional holographic displays that can be erased and rewritten in a matter of minutes.The holographic displays  which are viewed without special eyewear  are the first updatable three-dimensional displays with memory ever to be developed, making them ideal tools for medical, industrial and military applications that require "situational awareness.""This is a new type of...
Patients with diabetes, cardiac problems, kidney disorders or high blood pressure could benefit from the development of new hologram technology. The new "smart" holograms, which can detect changes in, for example, blood-glucose levels, should make self-diagnosis much simpler, cheaper and more reliable; write Chris Lowe and Cynthia Larbey in February's Physics World.A hologram is a recording of an optical interference pattern created when laser light shone on an object is made to...
Photoconducting polymers doped with nonlinear optical chromophores have emerged as efficient and inexpensive photorefractive (PR) materials. These materials show promise for applications in dynamic volume holography, image formation, optical processing, reversible data storage, correlation, etc. Recently, PR polymer composites have gained a great amount of attention due to their large PR effect, structural flexibility, and good processability. J. L. Maldonado, G. Ramos-OrtÃz, O....
For many years, researchers have looked to develop organic materials as a reliable and cost effective replacement for inorganic materials in optical devices. The development of highly functionalized optical devices using photonics instead of optoelectronics has highlighted the need for greater control over the manipulation of optical signals. Photo-control of molecular orientation of polymer materials is of great interest for the development of highly functionalized holographic optical...
