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A light field camera, also known as a plenoptic camera, is a camera that captures information about the light field emanating from a scene; that is, the intensity of light in a scene, and also the precise direction that the light rays are traveling in space. This contrasts with conventional cameras, which record only light intensity at various ...
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Phase-contrast imaging is commonly used in atomic physics to describe a range of techniques for dispersively imaging ultracold atoms. Dispersion is the phenomena of the propagation of electromagnetic fields (light) in matter. In general, the refractive index of a material, which alters the phase velocity and refraction of the field, depends on ...
A light field is a collection of all the rays flowing through some free space, where each ray can be parameterized with four variables.[3] In many cases, two 2D coordinates–denoted as (s,t){\displaystyle (s,t)}& (u,v){\displaystyle (u,v)}–on two parallel planes with which the rays intersect are applied for parameterization.
High-resolution image of magnesium sample. High-resolution transmission electron microscopy is an imaging mode of specialized transmission electron microscopes that allows for direct imaging of the atomic structure of samples. [1] [2] It is a powerful tool to study properties of materials on the atomic scale, such as semiconductors, metals ...
A cathode-ray tube(CRT) is a vacuum tubecontaining one or more electron guns, which emit electronbeams that are manipulated to display images on a phosphorescentscreen.[2] The images may represent electrical waveformson an oscilloscope, a frameof videoon an analogtelevision set(TV), digitalraster graphicson a computer monitor, or other phenomena like radartargets. A CRT in a TV is commonly ...
Video camera tubes were devices based on the cathode-ray tube that were used in television cameras to capture television images, prior to the introduction of charge-coupled device (CCD) image sensors in the 1980s. Several different types of tubes were in use from the early 1930s, and as late as the 1990s.
This variation is called vignetting, and can be corrected by selectively brightening the perimeter of the image. Flat-field correction ( FFC) is a digital imaging technique to mitigate the image detector pixel-to-pixel sensitivity and distortions in the optical path. It is a standard calibration procedure in everything from personal digital ...
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