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Also called calcite. A natural hexagonal crystal of calcium...
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An instrument in which an object's image, produced by a...
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A camera tube that employs a high-velocity electron beam to...
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A crystal that is devoid of any mosaic structure and that...
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Any filter in which the range of frequencies within a...
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A theoretical instrument conceived of as a box that...
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A system that transmits and receives identification codes...
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Pertaining to the possession of photoelectric...
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Luminous flux incident per unit area of a surface; luminous...
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Source of radiation defined or specified by its spectral...
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Metamerism that occurs when the light source is...
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Characteristic of a surface or object that has luminous...
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A magnifying lens fitted with a battery-operated lamp by...
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A desklike apparatus with an opal glass surface illuminated...
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The general term for the application of light to a subject....
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Generally, the orientation of rays of light striking a...
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A photometric instrument used to measure the illumination...
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A reproduction of an object produced by light rays. An...
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An electronic system using, in general form, an evacuated...
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The apparent luminance of the image as seen through an...
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One of several ad hoc estimators that can be used to...
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A method used in imaging to detect subtle differences...
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The variation in the intensity of an image formed by an...
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An electron tube that employs electromagnetic radiation to...
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A camera that uses an image converter tube in such a way...
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A machine vision technique that compares a template of the...
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In computer graphics, the coordinated two-dimensional or...
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See digitizer; frame...
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An electron tube that is used as a camera tube for a...
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The distance from the rear nodal point of a lens to the...
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The process by which an image is manipulated to increase...
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A semiconductor platelet laser that emits a coherent image...
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Complex devices, often involving a computer, in which a...
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A camera tube similar in design to the iconoscope. However,...
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An electronic tube equipped with a light-sensitive electron...
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A fiber optic device that rotates the image 180°...