- focal ray
- n.Brennstrahl m.
English-german dictionary. 2013.
English-german dictionary. 2013.
Ray transfer matrix analysis — (also known as ABCD matrix analysis) is a type of ray tracing technique used in the design of some optical systems, particularly lasers. It involves the construction of a ray transfer matrix which describes the optical system; tracing of a light… … Wikipedia
Ray O. Light Group — or ROL was a small anti revisionist Marxist Leninist group in the United States, founded by members of the Communist Party of the USA (CPUSA) who split from the party in 1961. In January 2008, the Ray O. Light group announced that the name of… … Wikipedia
Ray tracing (physics) — In physics, ray tracing is a method for calculating the path of waves or particles through a system with regions of varying propagation velocity, absorption characteristics, and reflecting surfaces. Under these circumstances, wavefronts may bend … Wikipedia
Focal mechanism — The focal mechanism of an earthquake describes the inelastic deformation in the source region that generates the seismic waves. In the case of a fault related event it refers to the orientation of the fault plane that slipped and the slip vector… … Wikipedia
focal spot size — The measured size of a focal spot of an x ray tube, a function of the actual size of the cathode and the angulation of the anode surface. See focal spot … Medical dictionary
ray — 1. A beam of light, heat, or other form of radiation. The rays from radium and other radioactive substances are produced by a spontaneous disintegration of the atom; they are electrically charged particles or electromagnetic waves of extremely… … Medical dictionary
focal point — noun (C) 1 the person or thing that you pay most attention to: The man on horseback acts as the focal point of the picture. 2 technical the point on a lens or a mirror where light ray (1) s meet … Longman dictionary of contemporary English
focal spot — the part of the target of an x ray tube which is bombarded by the focused electron stream when the tube is energized … Medical dictionary
focal spot — noun : the small area of the target of an X ray tube on which the cathode rays are focused … Useful english dictionary
X-ray tube — An X ray tube is a vacuum tube that produces X rays. They are used in X ray machines. X rays are part of the electromagnetic spectrum, an ionizing radiation with wavelengths shorter than ultraviolet light. X ray tubes evolved from experimental… … Wikipedia
Chandra X-ray Observatory — and Inertial Upper Stage sit inside the payload bay on Space Shuttle Columbia mission STS 93 General information … Wikipedia