A Fresnel lens is a type of composite compact lens which reduces the amount of material required compared to a conventional lens by dividing the lens into a set of concentric annular sections.
Cape D'Aguilar is a cape on Hong Kong Island, Hong Kong. The cape is on the southeastern end of D'Aguilar Peninsula. To its north are Shek O and D'Aguilar Peak.
The Cape Schanck Lighthouse was built in 1859 as the second coastal lighthouse in the Australian state of Victoria. It is located on Cape Schanck, at the southernmost tip of the Mornington Peninsula. The 21 metres (69 ft) tall tower was built from limestone. The light's focal plane is situated 100 metres (330 ft) above sea level, the light characteristic is the Morse code letter "N", a long signal of 10.8 seconds followed by a flash. Depending on the bearing of the light, the colours are either white or red. Due to its powerful lantern of one million candela and a first order Fresnel lens, which was installed in 1915, the light has a range of 26 nmi (48 km).
The Cliffy Island Lighthouse is located atop Cliffy Island, a steep-sided island which is the summit of a granite submarine mountain in the Bass Strait. Cliffy Island is located about 32 kilometres directly south of Port Albert, and roughly 38 kilometres to the northeast of Wilsons Promontory Lighthouse in Victoria, Australia. The lighthouse warns approaching vessels of rocks in Bass Strait by emitting a flash of white light every five seconds. The focal plane of the lightsource and Fresnel lens is situated 52 metres above sea level. The site is managed by the Victoria Department of Conservation and Natural Resources, while the lighthouse itself is operated by the Australian Maritime Safety Authority (AMSA). The island is accessible only by helicopter, and the entire site is closed to the public.
Cape Wrath Lighthouse at Cape Wrath was built in 1828 by Robert Stevenson and was manned until 1998, when it was converted to automatic operation by the Northern Lighthouse Board. It is located at the most North-Westerly point on the British mainland, in the traditional county of Sutherland within Highland Region. Durness is the closest village, 10 miles (16 km) to the south-east with Inverness around 120 miles (190 km) to the south.
Alcatraz Island Lighthouse is a lighthouse—the first one built on the U.S. West Coast—located on Alcatraz Island in California's San Francisco Bay. It is located at the southern end of the island near the entrance to the prison. The first light house on the island was completed in 1854, and served the bay during its time as a Citadel and military prison. It was replaced by a taller concrete tower built in 1909 to the south of the original one which was demolished after it was damaged due to earthquake in 1906. The automation of the lighthouse with a modern beacon took place in 1963, the year Alcatraz closed as the Alcatraz Federal Penitentiary. It is the oldest light station on the island with a modern beacon and is part of the museum on the island. Although when viewed from afar it easily looks the tallest structure on Alcatraz, it is actually shorter than the Alcatraz Water Tower, but as it lies on higher ground it looks much taller.
Woodman Light, also known as Woodman Point Lighthouse, Gage Roads Lighthouse and Coogee Lighthouse, is a lighthouse in Western Australia. Located on Woodman Point in the City of Cockburn, it has been in continuous operation since 1902. It is 9.8 metres (32 ft) high, and constructed of locally quarried limestone. It is located on the highest point of land in the area, which is unusually far inland for a lighthouse. On the same block of land are two Federation Bungalow style keepers' cottage, also built of limestone.
Smoky Cape Lighthouse is a heritage-listed active lighthouse located on Smoky Cape, a headland in Arakoon east of the town of South West Rocks, Kempsey Shire, New South Wales, Australia, and within the Hat Head National Park. It directs boats towards the entrance to the Macleay River, which is located just to the north of the lighthouse.
South Solitary Island Light is an active lighthouse on South Solitary Island, an island within the Solitary Islands Marine Park, about 15 kilometres (9.3 mi) northeast of Coffs Harbour, New South Wales, Australia. The lighthouse is located at the summit of the island. It is considered the most isolated lighthouse on the New South Wales coast. It was first in New South Wales to use kerosene over colza oil, and the last to do so before converting to electric power.
Cape Don Light is an active lighthouse located on Cape Don, at the tip of the Cobourg Peninsula, Northern Territory, Australia, in Garig Gunak Barlu National Park, marking the entrance to the Dundas Strait. It is Australia's northernmost traditional lighthouse. The station served on the important route to Darwin, between the peninsula and Melville Island. The tower was constructed in 1915–1917, during the "Golden Age of Australian Lighthouses" (1913–1920), and the tower was manned until 1983. During the entire period that the tower was manned it also maintained meteorological records which were well placed to assist in cyclone development tracking. The complex consists of the lighthouse, three residences and ancillary buildings.
Completed in 1849, the original 20-metre (66 ft) Wadjemup Lighthouse was Western Australia's first stone lighthouse and was built to provide a safer sailing passage for ships to Fremantle Port and the Swan River Colony.
Booby Island Light is an active heritage-listed lighthouse located on Booby Island in the Shire of Torres, near the tip of Cape York Peninsula, west of Prince of Wales Island, within the Endeavour Strait, Queensland, Australia. It marks the western entrance to the navigation channel through the Torres Strait. It was the last of the major lights to be constructed along the Queensland coast.
Sandy Cape Light is a heritage-listed active lighthouse located on Sandy Cape, the most northern point on K'gari, Queensland, Australia. It stands about 6 kilometres (3.7 mi) southwest of the northeastern tip of the island. It is the tallest lighthouse in Queensland. Built in 1870, it is the second major lighthouse to be built in Queensland after its formation in 1859. It is one of the first lighthouses in Australia to be constructed using bolted prefabricated segments of cast iron, and one of only two such lighthouses in Queensland, the other being its sibling, Bustard Head Light.
Cleveland Point Light, also known as Point Cleveland Light, is a lighthouse located on the north-eastern tip of Cleveland Point, at Cleveland, Redland City, Queensland, Australia. It overlooks Moreton Bay to the east and Raby Bay to the west. The old lighthouse was established in 1864-1865 as a wooden hexagonal tower. It is one of only two surviving lighthouses of this form, the other being Old Burnett Heads Light. A newer light, constructed of a concrete post, replaced it in 1976, and the old lighthouse was relocated a short distance away, where it stands today. The newer light was removed in 2009.
Dent Island Light is an active lighthouse on Dent Island, a small island off the coast of Queensland, Australia, part of the Whitsunday Group of the Whitsunday Islands. Located on the southwest tip of the island, the light guides ships navigating the Whitsunday Passage, between Whitsunday Island and the islands to the west, and marks the Dent Island Passage.
Eborac Island Light is an active lighthouse on Eborac Island, a small rocky island in the Adolphus Channel just off Cape York, the northern tip of Cape York Peninsula, Far North Queensland, Australia. It guides ships into the coastal channel inside the Great Barrier Reef. A concrete structure was built in 1921 and converted to solar power in 1990. It was replaced with a fiberglass structure in 2012.
Wharton Reef Light is an inactive lighthouse which used to be located on Wharton Reef in Princess Charlotte Bay off the Cape York Peninsula, Queensland, Australia. When it was deactivated in 1990 it was donated to the Townsville Maritime Museum and it is now on display near the museum. It is the only survivor of a series of twenty automatic lighthouses installed in Queensland during the "Golden Age of Australian Lighthouses" from 1913 to the early 1920s.
The Cape Agulhas Lighthouse is situated at Cape Agulhas, the southernmost tip of Africa. It was the third lighthouse to be built in South Africa, and the second-oldest still operating, after Green Point. It is located on the southern edge of the village of L'Agulhas, in the Agulhas National Park; the light is operated by Transnet National Ports Authority. In 2016, the American Society of Civil Engineers (ASCE) identified the lighthouse as a deserving prominent historic engineering project and International Historic Civil Engineering Landmark.
The Cape du Couedic Lighthouse is a lighthouse in South Australia located at Cape du Couedic on Kangaroo Island.
Eclipse Island Lighthouse is an active lighthouse in Eclipse Island off the south coast of Western Australia
