WebThe roots of holography can be traced back to 1920’s research in x-ray crystallography. The idea for holographic imaging was invented by Denis Gabor in 1947 while he was trying to obtain increased resolution in electron microscopy. His work proved the concept’s validity. Optical holography was not yet successful, however, due to poor quality. WebIn optical Fourier holography, diffuse illumination is used to achieve an almost linear recording of the spatial frequencies of the object on film. To this end, usually a ground glass is placed next to the object. However, then a speckle pattern occurs in the reconstruction.
The language of holography - light-am.com
WebJul 13, 1996 · This is a new and greatly expanded edition of what has become one of the best known introductions to the principles, techniques and applications of optical holography. Where necessary, existing sections have been updated to cover several new techniques and applications and two new chapters have been added. After presenting the … Optical holography is a technique which enables an optical wavefront to be recorded and later re-constructed. Holography is best known as a method of generating three-dimensional images but it also has a wide range of other applications. A hologram is made by superimposing a second wavefront (normally called the … See more To understand the process, it is helpful to understand interference and diffraction. Interference occurs when one or more wavefronts are superimposed. Diffraction occurs when a wavefront encounters an object. The process … See more Items required To make a hologram, the following are required: • a suitable object or set of objects • part of the laser beam to be … See more General form The complex amplitude of a monochromatic electromagnetic wave can be represented by See more When the hologram plate is illuminated by a laser beam identical to the reference beam which was used to record the hologram, an exact reconstruction of the original object wavefront is obtained. An imaging system (an eye or a camera) located in the … See more microwave general electric jvm3160rf1ss
Physics of optical holography - Wikipedia
WebOptical Holography: Materials, Theory and Applications provides researchers the fundamentals of holography through diffraction optics and an overview of the most relevant materials and applications, ranging from computer holograms to holographic data storage. Dr. Pierre Blanche leads a team of thought leaders in academia and industry in this ... WebOptical holography is an imaging method, which records the amplitude and phase of light reflected from an object as an interferometric pattern on film. It thus allows reconstruction of the full 3-D image of the object. In HNDT, the test sample is interferometrically compared in two different stressed states. WebMar 2, 2024 · holography, means of creating a unique photographic image without the use of a lens. The photographic recording of the image is … microwave general electric parts