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Luminescence
| Glossary Of Laser Terminology |
- Light emission which is not caused by heating
- The emission of light not ascribable directly to incandescence.
- Emission of light not caused by incandescence but rather by physiological processes, chemical action, friction or electrical action. (see both fluorescence and phosphorescence.)
- Cool light emitted by sources as a result of the movement of electrons from more energetic states to less energetic states. there are many types of luminescence. chemiluminescence is produced by certain chemical reactions. electroluminescence is produced by electric discharges, which may appear when silk or fur is stroked or when adhesive surfaces are separated. triboluminescence is produced by rubbing or crushing crystals.
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Люминесценция, русский
- (от лат . lumen, родительный падеж luminis - свет и -escent - суффикс, означающий слабое действие), свечение веществ, избыточное над их тепловым излучением при данной температуре и возбужденное какими-либо источниками энергии. возникает под действием света, радиоактивного и рентгеновского излучений, электрического поля, при химических реакциях и при механических воздействиях. примеры люминесценции - свечение гниющего дерева, некоторых насекомых, экрана телевизора. по механизму различают резонансную, спонтанную, вынужденную и рекомбинационную люминесценцию, по длительности - флуоресценцию (кратковременную люминесценцию) и фосфоресценцию (длительную люминесценцию).
- Эффект свечения при ультрафиолетовом облучении.
- Свечение некоторых веществ под действием све-та, радиоактивного и рентгеновского излучения, электрического поля, при химических реакциях и при механических воздействиях, например, свечение гниющего дерева, окисляющегося фосфора и др.
- Способность некоторых веществ, светиться при освещении невидимым ультрафиолетовым или синим светом.
Свечение, русский
Люминесценции, русский
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Incandescence, английский
- The emission of visible light as a result of heating.
- Emission of visible radiation as a result of heating.
- Emission of visible radiation as a result of heating. see also planck’s distribution law.
Electrical, английский
Fluorescence, английский
- Emission of light of particular wavelength, as a result of absorption of light at shorter wavelength. it is a property of some materials; each material has a specific wavelength of absorption and emission.
- Luminescence arising from irradiation with light
- The emission of visible light from a substance (such as a phosphor) as the result of, and during, the absorption of radiation of shorter wavelengths.
- The sending out of light from a substance which is receiving radiation
- Certain diamonds exhibit colored luminescence (usually blue) when exposed to strong sunlight or ultraviolet light. all you need to know about diamond fluorescence.
- Emission of visible light by a material such as diamond when it is simulated by higher energy x-rays, ultraviolet radiation or other forms of radiation. fluorescence continues only as long as the material is exposed to the radiation. strong or very strong fluorescence may make a diamond appear milky or oily especially in sunlight.
- Fluorescence happens when a diamond is exposed to ultraviolet light, it may emit a soft glow of white-ish, blue-ish or yellowish light. diamond grading reports will most often note whether a diamond has fluorescence, however, is not considered a grading factor, only a characteristic of that particular diamond.
- The property by which some minerals and some organic substances, when exposed to ultra¬violet radiations, emit a light of a color differing from their own, like the blue-white light emitted by scheelite.
- Emission of electromagnetic radiation, usually as visible light, that is caused by the flow of energy into the emitting body. the emission ceases abruptly when the excitation ceases. fly: the short, waste fibers that are released into the air in textile processing operations such as picking, carding, spinning, and weaving.
- The process in which molecules or matter absorb high energy photons and then emit lower energy photons. the difference in energy causes molecular vibrations.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer wavelength). in visual testing, fluorescence is typically a response to ultraviolet radiation.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer) visible light wavelength. fluorescence in ndt may be a material’s response to ultraviolet or ionizing radiation. the emission ceases as soon as the exciting energy is removed. differs from phosphorescence, which continues to emit after excitation energy is removed.
- Phenomenon of absorption of electromagnetic radiation and its reemission at a lower energy (longer) visible light wavelength. fluorescence may be a material’s response to ultraviolet or ionizing radiation. the emission ceases as soon as the exciting energy is removed. differs from phosphorescence, which continues to emit after excitation energy is removed. see also spectrofluorometer.
- Luminescent phenomenon exhibited by some substances where higher energy electromagnetic waves are absorbed and reemitted as lower energy waves. the emission ceases as soon as the exciting energy is removed. different from phosphorescence, which will continue to emit after the exciting energy is removed. in magnetic particle testing, pigments coating the magnetic particles are excited by invisible uv-a radiation and emit visible light.
Phosphorescence, английский
- A luminescence which lasts for a relatively long time after excitation of a medium
- Property of emitting light, without any apparent rise in temperature, or the light so produced, due to absorption of radiation from another source, and lasting after exposure has ceased.
- The emission of light as the result of the absorption of electromagnetic radiation; continues for a noticeable length of time after excitation.
- [1] the residual glow on a radar screen after the indicator sweep has moved on [2] incorrectly, bioluminescence.
- Emission of light that persists for a noticeable time after the removal of the excitation source.
- The ability of certain materials to absorb energy and then release that energy as light after a delay
Chemiluminescence, английский
- Luminescence arising from chemical reactions
- Хемилюминесценция. излучение поглощенной энергии в виде света как результат химической реакции. измеряя излучаемый свет, можно определить концентрацию одного из реагентов, если концентрация другого известна. подобные методы широко используются для определения содержания атмосферного озона и окиси азота на основании реакции этих загрязнителей с этиленом и озоном соответственно.
Electroluminescence, английский
- Luminescence arising from electrical influences
- The emission of light from a phosphor excited by electromagnetic energy.
Discharges, английский
An essential document for officers and seamen as it serves an official certificate confirming sea experience in the employment for which he was engaged.
Triboluminescence, английский
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Laser light, английский
Light generated with a laser device
Gaussian beams, английский
Light beams where the electric field profile in a plane perpendicular to the beam axis can be described with a gaussian function, possibly with an added parabolic phase profile
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