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diffraction

 [dĭ-frak´shun]
the bending or breaking up of a ray of light into its component parts.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

dif·frac·tion

(di-frak'shŭn),
Deflection of the rays of light from a straight line in passing by the edge of an opaque body or in passing an obstacle of about the size of the wavelength of the light.
[L. dif- fringo, pp. -fractus, to break in pieces]
Farlex Partner Medical Dictionary © Farlex 2012

dif·frac·tion

(di-frak'shŭn)
Deflection of the rays of light from a straight line in passing by the edge of an opaque body or in passing an obstacle of about the size of the wavelength of the light.
[L. dif- fringo, pp. -fractus, to break in pieces]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

diffraction

Deviation of the direction of propagation of a beam of light, which occurs when the light passes the edge of an obstacle such as a diaphragm, the pupil of the eye or a spectacle frame. There are two consequences of this phenomenon. First, the image of a point source cannot be a point image but a diffraction pattern. This pattern depends upon the shape and size of the diaphragm as well as the wavelength of light. Second, a system of close, parallel and equidistant grooves, slits or lines ruled on a polished surface can produce a light spectrum by diffraction. This is called a diffraction grating. See Airy's disc; diffraction fringes; Maurice's theory.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Indeed, these wavelengths guided in the glass will diffract due to the presence of the diffraction grating on the surface (coupling/uncoupling).
Notice that before accessing the toggle bit or trying to diffract, p clears location[p] using a compare-and-swap operation.
Demax has achieved this using a high density holographic grating that diffracts the light close to the surface in the direction where the falling beams are not visible.
Only a narrow spectral band of 10 |cm.sup.-1~ will be phase-matched to the acoustic beam and diffracted out of the main beam, with its plane of polarization rotated 90 |degrees~, since TAS is a birefringement crystal.
PB2 crystals and cocrystals were diffracted to 1.0 - 2.5 A.
Girls looked on in awe as College of Lake County student Heather Seidel diffracted light with an argon laser as the college in Grayslake hosted a STEM event Saturday.
She argues that fantasized fiction is a means for a narrator with a diffracted identity to exist through narration, based on how Freud defined fantasy and how Lacan deciphers its logic.
Luebbers' formulation is very practical in the calculation of the diffracted field but has some problems.
Due to the high correlation between the diffracted wave and its wavelet coefficients, the wavelet denoising can achieve good robustness [13].
As shown in Figure 2, sounds from the direction of the healthcare provider are diffracted once, while sounds from other directions are diffracted twice.
The relation between the incident wave and the diffracted wave is one-to-many, while the relation between the incident wave and the reflected wave is that one-to-one, as shown in Figure 1.
In this paper, an equalizing Dammann vortex grating (EDVG) is proposed by suppressing the even and zero diffraction order, which can be used to realize the uniform regulation of diffracted light intensity.