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Fresnel lens

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Fres·nel lens  (fr-nl)
n.
A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length, used primarily in spotlights, overhead projectors, and the headlights of motor vehicles.
[After Augustin Jean Fresnel.]
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Fresnel lens
Prisms that make up a Fresnel lens bend and magnify light rays, creating a single, concentrated beam of light.
Fresnel lens
n
(Physics / General Physics) a lens consisting of a number of smaller lenses arranged to give a flat surface of short focal length
[named after Augustin Jean Fresnel (1788-1827), French physicist]
Fresnel lens  (fr-nl)
A thin optical lens consisting of concentric rings of segmental lenses and having a short focal length. Placing a light source at the focal point of the lens gives rise to a strong beam of nearly parallel rays. Fresnel lenses are used primarily in spotlights, lighthouses, and the headlights of motor vehicles.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.Fresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal lengthFresnel lens - lens composed of a number of small lenses arranged to make a lightweight lens of large diameter and short focal length
headlamp, headlight - a powerful light with reflector; attached to the front of an automobile or locomotive
lens, lens system, lense - a transparent optical device used to converge or diverge transmitted light and to form images
searchlight - a light source with reflectors that projects a beam of light in a particular direction
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For three months, the light has been off at the historic structure, as contractors with the Oregon Parks and Recreation Department made repairs to the lantern rotated by eight brass carriage wheels that support its first-order Fresnel lens.
Heceta Head Lighthouse once again a shining example by The Register-Guard (Eugene, OR)
The best performing concentrators were the 46 cm acrylic Fresnel lens and thin-film parabolic reflector, having concentration ratios of 92 and 58, respectively.
A solar Stirling renewable energy power system for earth and space ... by Journal of the Alabama Academy of Science
Sizes of the jewel-like lenses range from a 2-ton second order lens, 8-ft high, to the smallest Fresnel lens, a sixth order lens, 18-in high and weighing less than 100-lb.
LIGHTHOUSE EXHIBIT EXPANDS by Leonard Panaggio / Sea Classics
 
 
 
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