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

Commissioners of Irish Lights, who operate the lighthouse, replaced the hyperradiant Fresnel lens optic with a flashing LED system that uses only solar power. This...

order lenses. Some lighthouses, such as those at Cape Race, Newfoundland, and Makapuu Point, Hawaii, used a more powerful hyperradiant Fresnel lens manufactured...

1908, the lighthouse was improved with the installation of a hyperradiant Fresnel lens manufactured by the English company Chance Brothers. The management...

designed to house the large Hyperradiant Fresnel lenses that became available at the end of the 19th century. Four of these lenses were used in Sri Lankan...

at the fair was a hyperradiant Fresnel lens – the largest size ever made, "off the chart" of sixth through first Order. This lens was on hand when it...

The exhibition includes large Fresnel lenses, with special emphasis on a panel the former Hyperradiant Fresnel lens of the Berlenga Lighthouse that...

Light First lit 1 February 1811  Focal height 28 m (92 ft)  Lens hyperradiant Fresnel lens  Intensity 1,900,000 candela  Range 18 nmi (33 km; 21 mi)  Characteristic...

45 s First lit 1 November 1892  Focal height 80 m (260 ft) Lens hyperradiant Fresnel lens  Light source engine generator Intensity 204,000 cd Range 22 nmi...

29-metre-tall (95 ft) concrete tower and a light with a massive hyperradiant Fresnel lens made by Chance Brothers in England. Its optic emitted a one million...

designed to house the large Hyperradiant Fresnel lenses that became available at the end of the 19th century. Four of these lenses were used in Sri Lankan...

installing a flashing lens apparatus. The hyperradiant fresnel lens gave one flash every fifteen seconds and was visible for 25–27 miles. The lens was designed...

within a revolving array of extra large hyperradiant Fresnel lenses (consisting, on each level, of five pairs of lens panels, displaying two white flashes...

designed to house the large Hyperradiant Fresnel lenses that became available at the end of the 19th century. Four of these lenses were used in Sri Lankan...

Board Heritage category A listed building  Focal height 34 m (112 ft) Lens "hyperradiant" Fresnel lens Range 21 nmi (39 km) Characteristic Fl (2) W 15 s...

was designed to accommodate a hyper-radial optic, the largest type of Fresnel lens available. Made up of six bullseye panels, and manufactured by F. Barbier...

of a handful of lighthouses in the world equipped with a giant hyperradiant Fresnel lens. It also boasted a new diaphone or compressed-air fog horn, a...

a paraffin lamp, subsequently converted to electricity. The original Fresnel lens is now in the nearby Gairloch Heritage Museum. The fog siren gave 4 blasts...

2016) Light First lit November 1889 Focal height 46 m (151 ft) Lens hyperradiant Fresnel lens  Range 27 nautical miles (50 km; 31 mi) Characteristic Fl W...

is an optical device made in France, from 1926. The lighthouse has a drum lens, made from forty-three prismatic crystals. Poland portal Engineering portal...

category A listed building  Light Focal height 40 metres (130 ft) Lens hyperradiant Fresnel lens  Range 18 nautical miles (33 km; 21 mi) Characteristic Fl W...

monument  Light First lit 1889 Focal height 73 metres (240 ft) Lens hyperradiant Fresnel lens  Range 12 nautical miles (22 km; 14 mi) Characteristic LFl W...

rare Early Iron Age bronze hoard found in Poolewe The original Hyperradiant Fresnel lens from nearby Rua Reidh Lighthouse A Replica croft house from over...

Hyperon Hyperplane Hyperpolarizability Hyperpolarization (physics) Hyperradiant Fresnel lens Hypersonic effect Hypersonic speed Hypersonic wind tunnel Hyperspace...

Northern Lighthouse Board Light Focal height 41 metres (135 ft) Lens hyperradiant Fresnel lens  Intensity 788,000 candela  Range 24 nautical miles (44 km;...

Northern Lighthouse Board  Light Focal height 40 m (130 ft)  Lens hyperradiant Fresnel lens  Range 17 nmi (31 km; 20 mi)  Characteristic Fl(3) W 30s ...

company founded in 1862, specializing in the manufacture of spotlights, Fresnel lenses for lighthouses, and lighting systems. It was the world's leading producer...

309917°N 157.649750°W / 21.309917; -157.649750 1909 1974 Active Hyperradiant Fresnel 420 420 ft (130 m) Moloka'i Light Molokai 21°12′34.5″N 156°58′10...