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The Detroit River Light, also known as Bar Point Shoal Light, was first established as a lightship in 1875. The current sparkplug lighthouse was built in 1885. It sits in Lake Erie, south of the mouth of the Detroit River, 1.75 nautical miles (3.24 km; 2.01 mi) from land and about 20 nautical miles (23 mi; 37 km) from the Ambassador Bridge in the Detroit River.
The Seul Choix Light is a lighthouse located in the northwest corner of Lake Michigan in Schoolcraft County, Michigan. [3] [6] The station was established in 1892 with a temporary light, [7] and this light started service in 1895, and was fully automated in 1972. It is an active aid to navigation. [3] There is now a museum at the light and both ...
Space sunshade. A space sunshade or sunshield is a parasol that diverts or otherwise reduces some of the Sun's radiation, preventing it from hitting a spacecraft or planet and thereby reducing its insolation, which results in reduced heating. Light can be diverted by different methods. The concept of the construction of sunshade as a method of ...
A plastic Fresnel lens sold as a TV-screen enlarging device The Fresnel lens used in the Sinclair FTV1 portable CRT TV, which enlarges the vertical aspect of the display only. Fresnel lenses are used as simple hand-held magnifiers. They are also used to correct several visual disorders, including ocular-motility disorders such as strabismus. [68]
The Toledo Harbor Lighthouse is a lighthouse in Lake Erie near Toledo, Ohio, in the United States. [5] The light replaced the 1837 lighthouse on Turtle Island at the mouth of the Maumee River. It is an active aid to navigation . The lighthouse is built on a 20-foot-deep (6 m) stone crib, 8.4 miles (13.5 km) from the mouth of the Maumee River ...
Fort Gratiot Light / ˈ ɡ r æ ʃ ɪ t /, the first lighthouse in the state of Michigan, was constructed north of Fort Gratiot in 1825 by Lucius Lyon, who later became one of Michigan's first U.S. Senators. The Fort Gratiot Light marks the entrance to the St. Clair River from Lake Huron (going south) in the southern portion of Michigan's Thumb.
A compact linear Fresnel reflector ( CLFR) – also referred to as a concentrating linear Fresnel reflector – is a specific type of linear Fresnel reflector ( LFR) technology. They are named for their similarity to a Fresnel lens, in which many small, thin lens fragments are combined to simulate a much thicker simple lens.
Solar thermal energy ( STE) is a form of energy and a technology for harnessing solar energy to generate thermal energy for use in industry, and in the residential and commercial sectors. Solar thermal collectors are classified by the United States Energy Information Administration as low-, medium-, or high-temperature collectors.