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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]
Optical holography [1] 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.
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.
DPH Devices: A DPH structure (left) and a nano-spectrometer hologram for the visible band (right). (Pictures from the NOD website). Digital planar holography (DPH) is a method for designing and fabricating miniature components for integrated optics.
Volume holograms are holograms where the thickness of the recording material is much larger than the light wavelength used for recording. In this case diffraction of light from the hologram is possible only as Bragg diffraction, i.e., the light has to have the right wavelength (color) and the wave must have the right shape (beam direction, wavefront profile).
Specular holography is a technique for making three dimensional imagery by controlling the motion of specular glints on a two-dimensional surface. The image is made of many specularities and has the appearance of a 3D surface-stippling made of dots of light.
A spigot (or "tap" or "faucet") is a valve for controlling the release of a gas or liquid.. Spigot may also refer to: . AT-4 Spigot, NATO reporting name for 9K111 Fagot, a Russian anti-tank missile
A hologram on a Nokia mobile phone battery.This is intended to show the battery is 'original Nokia' and not a cheaper imitation. A hologram label on a paper box for security