Fresnel zone

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Fresnel zone

[freznel′]

Etymology: Augustine J. Fresnel, French physicist, 1788-1827

the region nearest the face of an ultrasound transducer. It is characterized by a highly collimated beam with great variation in ultrasound intensity and is generally the area of best image resolution. Also called near field.

Fresnel zone

in ultrasonography, the area of the sound beam between the transducer and the focal zone in which complex diffraction patterns occur.

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Fraunhofer zone near field			As the corresponding effect at the point of observation P is attributable to the central Fresnel zone at Q acting alone, there is no need to know the nature of this aniso-tropy and hence it follows that dU(P) = (i/[lambda])U(Q) exp (ikQP)/QP. Issues in optical diffraction theory by Mielenz, Klaus D. / Journal of Research of the National Institute of Standards and Technology The tech rep responds, "That's good to know, but what about proper Fresnel Zone clearance? Is Mr. Fresnel causing problems? by Kmetz, Joel / Communications News Although the deployment was Near-Line-of-Sight (nLoS), with a partially obstructed fresnel zone, radio and radar interference at and around the airport prevented wireless systems from reliably connecting. Rapid Systems Deploys Orthogon's OS-Gemini to Complete Challenging ... by Business Wire			frenotomy frenulum frenulum linguae frenulum of clitoris frenulum of labia minora frenulum of lip frenulum of prepuce frenulum of pudendal lips frenulum of the clitoris frenulum of the ileal orifice frenulum of the lips frenulum of the tongue frenulum of tongue frenum frenzy Freon frequency Frequent Flyer frescon fresh cows fresh frozen plasma Fresh Water Drowning freshening Freshman 15 freshness Fresnel zone Fresnel's bi-prism Fresnel's formula fretting Freud freudian freudian fixation freudian slip freudianism freudism Freund's adjuvant Freund's complete adjuvant Freund's incomplete adjuvant Frey syndrome Frey's irritation hairs Freyana FRF friable friar's balsam fribby fribs fricative Frick speculum Fricke dosimeter friction friction burn			Fresnel equation Fresnel equations Fresnel fringe Fresnel integral Fresnel integrals Fresnel lamp Fresnel lens Fresnel lens Fresnel Lens Landing System Fresnel Lens Optical Landing System fresnel lenses fresnel lenses Fresnel mirrors Fresnel ovaloid Fresnel pattern Fresnel patterns Fresnel reflection Fresnel reflection formula Fresnel reflectivity Fresnel reflector Fresnel reflector Fresnel region Fresnel rhomb Fresnel Sine Integral Fresnel spotlight Fresnel term Fresnel theory of double refraction Fresnel zone Fresnel Zone Acoustic Lens Fresnel Zone Antenna Fresnel zone plate Fresnel zone plate Fresnel Zone Plate Antenna Fresnel Zone Plate Lens Fresnel zones Fresnel's bi-prism Fresnel's bi-prism Fresnel's bi-prism Fresnel's formula Fresnel's rhomb Fresnel, Augustin Jean Fresnel, Augustin Jean Fresnel-Arago laws Fresnel-Huygens principle fresnels fresnels Fresnian Fresnillo Fresnillo, Zacatecas Fresno Fresno Fresno Area Down Syndrome Society Fresno Area Express Fresno Area Hispanic Chamber of Commerce Fresno Area Residents for Rail Consolidation Fresno Area Substitute Teachers Association Fresno Art Museum Fresno Bee

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