Roland Winston (born March 12, 1936) is a leading figure in the field of nonimaging optics [1] and its applications to solar energy, and is sometimes termed the "father of non-imaging optics". [2] [3] He is the inventor of the compound parabolic concentrator(CPC), a breakthrough technology in solar energy. He is also a former Guggenheim Fellow, past head of the University of Chicago Department of Physics, a member of the founding faculty of University of California Merced, and as of 2013, head of the California Advanced Solar Technologies Institute. [4]
He holds more than 25 patents, [3] chiefly related to solar energy, and has been figuratively said to have a "patent on the sun". [5]
Winston was born in Moscow, Russia to an American engineer who helped Russians design towns and build an industrial base. In 1942, him and his family had to evacuate Russia when the German military was within artillery range. After fleeing, he attended the Bronx High School of Science. [6]
Winston enrolled as an early entrant at Shimer College in 1950, transferring to the University of Chicago after two years. [7] [8] He received a BA from Shimer in 1953, in a graduating class of 11, including future cosmologist Jerome Kristian. [7] Continuing with advanced undergraduate study at the University of Chicago, he received a BS in 1956. [9]
Winston remained at University of Chicago for his graduate work in physics, completing his MS in 1957 and his Ph.D. in 1963. [9] He studied under figures including Yoichiro Nambu and Subrahmanyan Chandrasekhar. [2] Winston's doctoral dissertation was on "observable hyperfine effects in muon capture by complex nuclei." [10]
Winston initially developed the underlying concept of the CPC for use in the study of Cherenkov radiation while working at Argonne National Laboratory in 1966. [2] [11] He was prompted to invent the CPC several years later in 1974, when Argonne director Robert Sachs asked him if it would be possible to extend the parabolic approach to solar energy applications, and if so, whether it would be superior to the existing systems that used imaging optics. [12] Only a year after the invention of the CPC, it was discovered that this design had been anticipated by hundreds of millions of years by the eyes of the horseshoe crab. [13] The paper announcing this discovery was also coauthored by Winston. [14]
A key advantage of the CPC over the earlier imaging collectors was that it could achieve very high efficiencies without needing to track the sun. [15] Non-tracking collectors had previously been believed to be impossible to design. [2] In addition, CPCs received considerable media attention for their ability to function even under heavily clouded and hazy skies. [16]
Winston and Joseph O'Gallagher devised a more refined version of the CPC in 1982, which was smaller and eliminated the need for an extra layer of glass. [17]
In 1988, using a new mirror-based technique, Winston and his team set a new record for concentration of solar energy, concentrating sunlight to more than 60,000 times its normal intensity. [18] In 1989, Winston coauthored with W.T. Welford what became the defining text of the field, High Collection Nonimaging Optics. Later revised under the name of Nonimaging Optics, it remains a classic in the field.
From 1989 to 1995, he served as chair of the Department of Physics of the University of Chicago. [4] In addition to his solar energy work, he has continued to work in his original field of high-energy physics, conducting experiments at Argonne and Fermilab. [4] [19]
In 2003, Winston left the University of Chicago, where he had been working and studying since 1952, to join the founding faculty of the University of California Merced. [8] He has however remained connected the U of C and the city of Chicago, and has remained affiliated with the university's Enrico Fermi Institute. [5] In 2004 he partnered with Chicago company Solargenix Energy to create roof-integrated solar cooling and heating systems. [5]
On June 13, 2022, Professor Winston announced he would retire on July 1, 2022. Of the first eight founding faculty members, he is the first one to leave after nearly two decades of service to the UC Merced and the University of California system. [20]
Winston has received numerous awards in the course of his career, including a Guggenheim Fellowship in 1977 [21] and the Joseph Fraunhofer Award for "significant accomplishments in optical engineering" from the Optical Society of America in 2009. [2] He was elected as a US delegate to the International Solar Energy Society in 1991. [22] Also in 1991, he was elected a Fellow of OSA.
Devices to which Winston's name has become attached include the CPC itself, which is sometimes known as a "Winston solar collector", [23] and "Winston cones", the individual parabolic elements that make up a CPC.
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. Low-temperature collectors are generally unglazed and used to heat swimming pools or to heat ventilation air. Medium-temperature collectors are also usually flat plates but are used for heating water or air for residential and commercial use.
Eli Yablonovitch is an American physicist and engineer who, along with Sajeev John, founded the field of photonic crystals in 1987. He and his team were the first to create a 3-dimensional structure that exhibited a full photonic bandgap, which has been named Yablonovite. In addition to pioneering photonic crystals, he was the first to recognize that a strained quantum-well laser has a significantly reduced threshold current compared to its unstrained counterpart. This is now employed in the majority of semiconductor lasers fabricated throughout the world. His seminal paper reporting inhibited spontaneous emission in photonic crystals is among the most highly cited papers in physics and engineering.
The Institute for Nuclear Studies was founded September 1945 as part of the University of Chicago with Samuel King Allison as director. On November 20, 1955, it was renamed The Enrico Fermi Institute for Nuclear Studies. The name was shortened to The Enrico Fermi Institute (EFI) in January 1968.
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A parabolic trough collector (PTC) is a type of solar thermal collector that is straight in one dimension and curved as a parabola in the other two, lined with a polished metal mirror. The sunlight which enters the mirror parallel to its plane of symmetry is focused along the focal line, where objects are positioned that are intended to be heated. In a solar cooker, for example, food is placed at the focal line of a trough, which is cooked when the trough is aimed so the Sun is in its plane of symmetry.
Nonimaging optics is a branch of optics that is concerned with the optimal transfer of light radiation between a source and a target. Unlike traditional imaging optics, the techniques involved do not attempt to form an image of the source; instead an optimized optical system for optimal radiative transfer from a source to a target is desired.
A solar tracker is a device that orients a payload toward the Sun. Payloads are usually solar panels, parabolic troughs, Fresnel reflectors, lenses, or the mirrors of a heliostat.
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Concentrated solar power systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight into a receiver. Electricity is generated when the concentrated light is converted to heat, which drives a heat engine connected to an electrical power generator or powers a thermochemical reaction.
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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. These mirrors are capable of concentrating the sun's energy to approximately 30 times its normal intensity.
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A Winston cone is a non-imaging light collector in the shape of an off-axis parabola of revolution with a reflective inner surface. It concentrates the light passing through a relatively large entrance aperture through a smaller exit aperture. The collection of incoming rays is maximized by allowing off-axis rays to make multiple reflections before reaching the exit aperture. Winston cones are used to concentrate light from a large area onto a smaller photodetector or photomultiplier. They are widely used for measurements in the far infrared portion of the electromagnetic spectrum in part because there are no suitable materials to form lenses in the range.
Bill Parkyn was an American scientist who lived in Lomita, California area and worked on nonimaging optics.
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Walter Thompson Welford was a British physicist with expertise in optics.
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