- diffraction spot
- 衍射斑点
English-Chinese metallurgy dictionary. 2014.
diffraction spot
Look at other dictionaries:
Diffraction topography — (short: topography ) is an X ray imaging technique based on Bragg diffraction. Diffraction topographic images ( topographs ) record the intensity profile of a beam of X rays (or, sometimes, neutrons) diffracted by a crystal. A topograph thus… … Wikipedia
Diffraction — Computer generated intensity pattern formed on a screen by diffraction from a square aperture … Wikipedia
Diffraction-limited system — Memorial to Ernst Karl Abbe, who approximated the diffraction limit of a microscope as , where d is the resolvable feature size, λ is the wavelength of light, n is the index of refraction of the medium being imaged in, and θ (depicted as α in the … Wikipedia
Poisson's spot — ▪ diffraction also called Arago s spot diffraction pattern produced by a small spherical object in the path of parallel light rays. French physicist Augustin Jean Fresnel (Fresnel, Augustin Jean) presented much of his work on diffraction… … Universalium
Fresnel diffraction — In optics, the Fresnel diffraction equation for near field diffraction, is an approximation of Kirchhoff Fresnel diffraction that can be applied to the propagation of waves in the near field.[1] The near field can be specified by the Fresnel… … Wikipedia
Selected area diffraction — Selected area (electron) diffraction, abbreviated as SAD (SAED), is a crystallographic experimental technique that can be performed inside a transmission electron microscope (TEM).In a TEM, a thin crystalline specimen is subjected to a parallel… … Wikipedia
Arago spot — In optics, an Arago spot is a bright point which appears at the center of the shadow of a circular object in light from a point source. It is also sometimes called a Poisson spot. [Citation | last =Pedrotti | first =Frank L. | last2 =Pedrotti |… … Wikipedia
X-ray crystallography — can locate every atom in a zeolite, an aluminosilicate with many important applications, such as water purification. X ray crystallography is a method of determining the arrangement of atoms within a crystal, in which a beam of X rays strikes a… … Wikipedia
Iddingsite — is an alteration of olivine that consists of a mixture of clay minerals, iron oxides and ferrihydrides. Iddingsite forms from the weathering of basalt in the presence of liquid water and can be described as a phenocryst meaning it has… … Wikipedia
Depth of field — The area within the depth of field appears sharp, while the areas in front of and beyond the depth of field appear blurry … Wikipedia
light — light1 lightful, adj. lightfully, adv. /luyt/, n., adj., lighter, lightest, v., lighted or lit, lighting. n. 1. something that makes things visible or affords illumination: All colors depend on light. 2. Physics … Universalium
