A Fresnel lens (/ˈfreɪnɛl, -nəl/ FRAY-nel, -⁠nəl; /ˈfrɛnɛl, -əl/ FREN-el, -⁠əl; or /freɪˈnɛl/ fray-NEL) is a type of composite compact lens which reduces...

lantern Fresnel lens Fresnel number Fresnel rhomb Fresnel zone Fresnel zone antenna Fresnel's wave surface Fresnel zone plate Huygens–Fresnel principle...

Hyper-radial or hyperradiant Fresnel lenses are Fresnel lenses used in lighthouses. They are larger than "first-order" lenses, having a focal length (radius)...

A Fresnel lantern (pronounced frəˈnɛl or fruh-nel) is a common lantern used in theatre that employs a Fresnel lens to wash light over an area of the stage...

ring-shaped lenses. These are collectively known as a Fresnel lens, which, despite being significantly thinner, operates effectively as a single lens. This...

the choice of light sources, mountings, reflector design, the use of Fresnel lenses, and in rotation and shuttering systems providing lighthouses with individual...

the system. The improved fresnel lens optical landing system, IFLOLS, uses a fiber optic "source" light, projected through lenses to present a sharper, crisper...

generator is available. Arago spot Diffraction grating Fresnel imager Fresnel lens Fresnel number Fresnel zone antenna Photon sieve G. W. Webb, I. V. Minin...

their similarity to a Fresnel lens, in which many small, thin lens fragments are combined to simulate a much thicker simple lens. These mirrors are capable...

condensing elements below the Fresnel lens serve to increase the portion of the light bulb's output which reaches the Fresnel lens in the first place. In order...

in Dieppe. The tower later became the first to use the revolutionary Fresnel lens, in the early 1820s.) In Britain, lighthouses were privately owned, and...

fourth-order Fresnel lens was installed; that lens was replaced by a second-order Fresnel lens, which was replaced later by an aerobeacon in 1958. That lens was...

science fiction author Gregory Benford calculated that a concave rotating Fresnel lens 1000 kilometres across, yet only a few millimeters thick, floating in...

plane arrays to be used with the extended hemispherical lens. Luneburg lens Fresnel lens Lens antenna Frid, Henrik (2016). "Closed-Form Relation Between...

infrared energy onto the sensor. Each individual facet is a Fresnel lens. Multi-Fresnel lens type of PIR PIR motion detector housing with cylindrical faceted...

Fresnel lens from regular duty. The First order Fresnel lens is no longer lit to celebrate special occasions, such as the annual lighting of the lens...

development of lighthouses in terms of cost, design, and implementation. Fresnel lens were developed that considered these constraints by featuring less material...

the moon Fresnel lens, a type of composite compact lens French submarine Fresnel, more than one submarine of the French Navy Fulgence Fresnel (1795–1855)...

category of reflector and lens antennas. Unlike traditional reflector and lens antennas, however, the focusing effect in a Fresnel zone antenna is achieved...

(depending on direction), occulting once every 6 seconds. There is a fresnel lens that has been in use since 1906. It can be seen for up to 8 nmi (15 km;...

permitting. The main chamber of the lighthouse, known as the Lens Room, features the Fresnel lens and clockwork mechanism, and is open to the public on a limited...

first-order Fresnel lens which allowed the light to shine brighter. On May 20, 1861, North Carolina joined the Confederacy and all of the lenses were removed...

Celor lens Chevalier lens Cooke Triplet Double-Gauss lens Frazier lens Fresnel lens Gauss lens Inverted telephoto (retrofocus) lens Petzval lens Plasmat...

the United States — and one of the few with an original first-order Fresnel lens to cast its light. The preceding Bodie Island lighthouses actually stood...

the Fresnel Lens. Lepaute Manufacturing was founded in 1838 by the watchmaker/inventor, Henri Lepaute. Thus, the manufacture of the Fresnel Lens also...

by George Meade and still retains its original first-order fixed Fresnel lens. The lens is made of lead glass and weighs 12,800 pounds (5,800 kg) As the...

The Minolta SR-T 101 is a 35mm manual focus SLR camera with Through-The-Lens exposure metering – TTL for short - that was launched in 1966 by Minolta Camera...

focal plane of the lens falls 48 micrometers behind the image printed on the back of the lens. Fresnel lens, a different 'flat' lens technology Integral...

have a Fresnel lens with a spherical reflector or an ellipsoidal reflector with a lens train containing two plano-convex lenses or a single step lens. The...

first-order flashing Fresnel lens, which stood about 12 feet (3.7 m) tall. The total cost of the project was about $40,000, with the lens alone costing $15...