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Diffraction limited
| Glossary Of Laser Terminology |
Electromagnetic waves diffract around the edges of opaque objects, or on passing through or reflecting off a finite aperture, like a dish, lens or mirror. even if such a wave is perfectly collimated, so that the beam emitted is parallel, it will eventually spread out. the larger the aperture in relation to the wavelength, the smaller the beam spread. an electromagnetic beam is said to be "diffraction limited" when it is so collimated that it cannot be made more narrow in the near-field. receivers are also said to be "diffraction limited" when the energy is focused into the smallest possible spot size at the focal plane. an optical receiver that is not "diffraction limited" may be said to be a "light bucket" - it collects photons, but cannot concentrate them into a very small tightly focused spot.
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Diffract, английский
Diffracted bandwidth, английский
Ширина полосы дифракции
Diffracted beam, английский
Diffracted event, английский
Ось синфазности диафрагировая
Diffracted field, английский
Diffracted light, английский
Diffracted light energy, английский
Diffracted object field, английский
Diffracted radiation, английский
Diffracted wave, английский
Diffracted wavefront, английский
Diffracted-beam energy, английский
Diffracting aperture, английский
Diffraction, английский
- The "spreading" of waves into the lee of obstacles such as breakwaters by the transfer of wave energy along wave crests. diffracted waves are lower in height than incident waves.
- Дифракция
- Deviation of the direction of propagation of a radiation, determined by the wave nature of radiation, and occurring when the radiation passes the edge of an obstacle.
- A wave property which creates deviation from a straight line when the beam passes near an edge of an opaque object. deviation of part of a beam, determined by the wave nature of radiation and occurring when the radiation passes the edge of an opaque obstacle.
- Light curves or travels around small circular objects.
- The changing of direction (bending or spreading) that occurs when a light wave interacts with an opening or barrier
- (1) in acoustics, the reflection of a wave front when passing the edge of an ultrasonically opaque object. (2) in radiation technologies, a special case of scatter, where coherently scattered photons undergo interference or reinforcement, resulting in patterns indicative of the scattering medium. see also xray diffraction.
- (1) в акустике - отражение волнового фронта при прохождении края непрозрачного для ультразвука объекта. (2) в радиационных технологиях - особый случай рассеяния, когда когерентно рассеянные фотоны подвергаются интерференции или усилению, что приводит к образованию структур, указывающих на рассеивающую среду. см. также дифракция рентгеновских лучей.
- (1) in radiographic testing, special case of scatter, where coherently scattered (full intensity is retained) photons undergo interference or reinforcement, resulting in patterns indicative of the scattering medium. see also x-ray diffraction. (2) in ultrasonic testing, deflection of a wavefront when passing the edge of an ultrasonically opaque object.15
- Deflection of a wavefront when passing the edge of an ultrasonically opaque object.7,22
Diffraction (rt), английский
The scattering of incident radiation from the regularly spaced atoms in crystals or complex molecules such that interference between the scattered waves results in a pattern of maxima and minima in the intensity of the scattered radiation.
Diffraction (ut), английский
The deflection of a wave front when passing the edges of an obstacle.
Diffraction formula, английский
Diffraction from hologram, английский
Diffraction from pattern, английский
Diffraction from volume hologram, английский
Diffraction grating, английский
- An array of fine, parallel, equally-spaced reflecting or transmitting lines that mutually enhance the effects of diffraction to concentrate the diffracted light in a few directions determined by the spacing of the lines and by the wavelength of the light
- An array of fine, parallel, equally spaced reflecting or transmitting lines that mutually enhance the effects of diffraction to concentrate the diffracted light in a few directions determined by the spacing of the lines and by the wavelength of the light.
- Дифракционная решетка
Electromagnetic, английский
Reflecting, английский
Wavelength, английский
- Light is made up of electromagnetic waves; wavelength is the crest (peak)-to-crest distance between two adjacent waves.
- Для оптических сетевых устройств длина волны светового потока составляет 850, 1300, 1310 и 1550 нм
- The optical term for frequency. fiber optics generally uses the 850 nm, 1300/1310 nm, 1550 nm and 1625 nm wavelengths for transmission purpose due to the marriage of performance with light sources, optical fibers, and optical detector technologies
- Distance in the direction of propagation of a periodic wave between two successive points at which the phase is the same. tel 203•377•8282 fax 203•378•2457 e-mail res_sales@oriel.com url www.oriel.com 9-17 polarization lenses optics prisms & filters beam splitters windows, substrates & mirrors properties of optical coatings optical materials
- The length of the light wave, usually measured from crest to crest, which determines its color. common units of measurement are the micrometer (micron), the nanometer, and the angstrom unit.
- The spatial period of a plane wave
- The distance between "waves" in the electromagnetic field, specified as angstroms or nanometers.
- The distance an electromagnetic wave travels in the time it takes to oscillate through a complete cycle. wavelengths of light are measured in nanometers (10-9 m) or micrometers (10-6m).
- The linear distance occupied by one complete cycle of vibration of an energy form from any given point to the next point characterized by the same phase.
- For light waves or sound waves, the distance between two successive points of a periodic wave in the direction of propagation, in which the oscillation has the same phase; the distance the wave travels in one period. for light waves three common units of wavelength are: micrometer, nanometer, and angstrom. wave molding, oundy molding, swelled chamfer, undulating molding, undy
- Длина волны wax 1. воск 2. парафин 3. пластичная глина way 1. путь; дорога 2. проход; переход 3. колея 4. направление, сторона 5. амер, расстояние
- The physical length between corresponding points of successive cycles of a wave. low frequencies have long wavelengths; high frequencies have short wavelengths.
- The distance between the crests of a wave in a radio signal, measured as the speed of light divided by the frequency in- hz.
- The distance between one peak of a wave and the next peak
- Light is measured by its wavelength (in nanometers) or frequency (in hertz). one wavelength. equals the distance between two successive wave crests.
- The distance between two points having the same phase in two consecutive cycles of a periodic wave, along a line in the direction of propagation.
- Distance between repeating values of a wave — for example, the distance from one peak to the next peak on a sine wave. wavelength is a fundamental descriptor when discussing wave behavior, system sensitivity, and diffraction effects.
- Distance between repeating values of a wave. for example, the distance from one peak to the next peak on a sine wave.
- Distance between repeating values of a wave. for example, the distance from one peak to the next peak on a sine wave. wavelength is generally measured in nanometers when considering uv-a radiation (for example, 365 nm). compare frequency.
- Distance between repeating units of a wave. for example, the distance from one peak to the next peak.
- Distance needed in the propagation direction for a wave to go through a complete cycle.7,21
Concentrate, английский
- A solution from which water has been removed verb 1. concept 84 to give full attention to something 2. to concentrate on to examine something in particular 3. to reduce a solution and increase its strength by evaporation
- A product that contains the valuable material after all the waste has been eliminated
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Enhanced pulsing, английский
Electronic modulation of a laser beam to produce high peak power at the initial stage of the pulse. this allows rapid vaporization of the material without heating the surrounding area. such pulses are many times the peak power of the cw mode (also called "superpulse").
Interstellar scintillation, английский
Electromagnetic waves as they propagate though the interstellar media suffer frequency-selective fading. the resulting corrupted signal is said to undergo scintillation effects. the higher the modulation bandwidth the worse the effect.
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