Fresnel

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Fresnel

Augustin Jean . 1788--1827, French physicist: worked on the interference of light, contributing to the wave theory of light
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

fresnel

[frā′nel]
(physics)
A unit of frequency, equal to 1012 hertz.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
There are several advantages in using the Fresnel lenses compared to a light guide.
In the view zones, the low luminance homogeneity on the screen received by eyes may easily occur at the joint of any two adjacent Fresnel lenses and in certain areas of the Fresnel lenses where the machining accuracy is not sufficiently accurate [29, 30].
Spinella explained the history of Fresnel lenses, which can be traced back to France.
Kim, "Concept and design of modular Fresnel lenses for concentration solar PV system," Solar Energy, vol.
In the largely centralized and technocratic state of France, the institutionalization of new lighthouses equipped with Fresnel lenses followed a "rational plan." In the United States, factors such as the role of open markets, the status of scientists and engineers, and the reluctance to use (or opposition to) federal funding of large state projects left efforts to update the then-current system stuck in a bureaucratic trap and with inadequate funding.
Suzuki, Nonimaging Fresnel Lenses: Design and Performance of Solar Concentrators, Springer, Heidelberg, Germany, 2001.
07 Milan-based designers Paolo Bizzatto and Francisco Gomez Paz masterminded Luceplan's radiolarian-like Hope light (2009), made of polycarbonate Fresnel lenses. In HOPE (Lotus), they present a behind-the-scenes look at its conception, development, and production.
The multifunctional system consists of an entire camera, two sensors equipped with Fresnel lenses to detect light signals, and an infrared LED.
In this text, he covers general prisms and reflectors; polarization properties of prisms and reflectors; specialized prism types; prism and mirror system design, analysis, and fabrication; a selection of prism applications; projection displays; microprismatic arrays; and Fresnel lenses. The applications addressed in the book include, among others, a LADAR guidance system using prism pairs, aplanatic prism spectrography, a reflecting wedge prism for an optical reader, and inversion prisms for range finders.
total, that act as Fresnel lenses. Crandall used phased zone plates to bend light without a loss of brightness, allowing the MicroSight to be used without any additional equipment.
With thousands of European truckers travelling along the A55 to Ireland road chiefs will now dish out more than 1,000 Fresnel lenses to lorry drivers at their check points at Holyhead and Ewloe.