Self-diffraction in the semilinear generator geometry is investigated using statistical approach. A dynamical hologram is formed in the process of the four wave mixing of the signal image which undergoes self-diffraction and the reference image with their fannings on the background of the previous expositions with different signal images and reference beams. Phonon scattering. Scatter electrons to 5 - 15 mrad – Diffuse background in diffraction pattern – Energy loss I Convince your self! Neutron scattering is a severely underused technique for studies of catalysts. How & why neutrons are useful to catalysis - includes Neutron diffraction.
Энциклопедический словарь по металлургии. — М.: Интермет Инжиниринг. Главный редактор Н.П. Лякишев. 2000.
Смотреть что такое 'self-radiation' в других словарях:
neutron self-radiation — savasis neutronų spinduliavimas statusas T sritis fizika atitikmenys: angl. neutron self radiation vok. Neutroneneigenstrahlung, f rus. собственное нейтронное излучение, n pranc. rayonnement neutronique propre, m … Fizikos terminų žodynas
Self-focusing — is a non linear optical process induced by the change in refractive index of materials exposed to intense electromagnetic radiation. [Cumberbatch, E. Self focusing in Non linear optics , J. Inst. Maths Applics 6, 250 (1970)] Mourou, G. A. et al.… … Wikipedia
Self-powered lighting — is a generic term describing devices that emit light continuously without an external power source. Self powered lighting is most frequently used on wristwatches (i.e. Night watches), gun sights, and certain emergency and tactical equipment.Early … Wikipedia
Self-creation cosmology — (SCC) theories are gravitational theories in which the mass of the universe is created out of its self contained gravitational and scalar fields, as opposed to the theory of continuous creation cosmology or the steady state theory which depend on … Wikipedia
Self-organization — is a process of attraction and repulsion in which the internal organization of a system, normally an open system, increases in complexity without being guided or managed by an outside source. Self organizing systems typically (though not always)… … Wikipedia
Radiation hardening — is a method of designing and testing electronic components and systems to make them resistant to damage or malfunctions caused by ionizing radiation (particle radiation and high energy electromagnetic radiation), such as would be encountered… … Wikipedia
Radiation (disambiguation) — Radiation may have one of the following meanings: * Radiation in physics: **Radiation, an emission of energy or particles **Electromagnetic Radiation, a self propagating wave of electric and magnetic fields, including such phenomena as radio… … Wikipedia
Self-Amplified Stimulated-Emission — Self Amplified Spontaneous (or Stimulated) Emission (SASE) is a process within a Free electron laser (FEL) by which a laser beam is created by the high energy electron beam. The lasing starts up from the random microbunching (i.e., shot noise) on … Wikipedia
self-absorption — [self′ab sôrp′shən, self′abzôrp′shən] n. 1. absorption in one s own interests, affairs, etc. 2. Physics the absorption of radiation by the substance emitting the radiation self absorbed adj … English World dictionary
self-shielding — self shieldˈing noun (physics) A radiation emitting material or structure which absorbs part of its own emission • • • Main Entry: ↑self … Useful english dictionary
- Biology of Sensory Systems, C. U. M. Smith. Since publication of the first edition, huge developments have taken place in sensory biology research and new insights have been provided in particular by molecular biology. These show the… ПодробнееКупить за 18805.52 рубэлектронная книга
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- Basic Concepts of X-Ray Diffraction, Emil Zolotoyabko. Authored by a university professor deeply involved in X-ray diffraction-related research, this textbook is based on his lectures given to graduate students for more than 20 years. It adopts a… ПодробнееКупить за 7878.89 рубэлектронная книга
If an image is made through a small aperture, there is a point at which the resolution of the image is limited by the aperture diffraction. As a matter of general practice in photographic optics, the use of a smaller aperture (larger f-number) will give greater depth of field and a generally sharper image. But if the aperture is made too small, the effects of the diffraction will be large enough to begin to reduce that sharpness, and you have reached the point of diffraction-limited imaging.
If you are imaging two points of light, then the smallest separation at which you could discern that there are two could reasonably be used as the limit of resolution of the imaging process. Presuming that diffraction is the determining factor, then the generally accepted criterion for the minimum resolvable detail is the Rayleigh criterion.
Self Diffraction Frog
This shows the intensity curves for the radial distribution of the diffracted light for different separations. Your eye sees the characteristic bullseye distribution of light as illustrated below.
While perfect imaging of the source would be smaller perfect circles of light, this shows the smearing of the light by diffraction into the bullseye patterns.
For modern digital photography where the images are projected onto a CCD, the information is collected on pixels of the digital detector. At left is an attempt to show the effect of diffraction on such imaging in cases where the diffraction is the phenomenon that limits the resolution. If the image is in focus and free of visible affects of lens aberrations, then it may be that it will fit on one pixel. But if the aperture is small enough, then diffraction can spread the image onto neighboring pixels and constitute the limit on the resolution of the image.
Self Diffraction Definition
The Cambridge in Colour site has calculations and demonstrations of diffraction spreading at different f-numbers.