Dennis Gabor

Dennis Gabor (Hungarian: Gábor Dénes; born 5 June 1900 in Budapest, died February 1979 in London) was a Hungarian-born British electrical engineer and applied physicist who invented holography. He conceived the method, which he called "wavefront reconstruction", in 1947 while working at the British Thomson-Houston research laboratory in Rugby, England, and published it in Nature in 1948 under the title "A New Microscopic Principle". He received the 1971 Nobel Prize in Physics, as the sole laureate, "for his invention and development of the holographic method".

Gabor's aim was a sharper electron microscope, and his own experiments with filtered mercury-lamp light produced only small, imperfect images. Holography became practical after the laser arrived in the early 1960s. The principle he described, recording the phase of a light wave by letting it interfere with a reference wave, underlies the holographic optical elements used as combiners in some augmented reality displays and the computer-generated holography that researchers are developing for holographic displays in VR and AR headsets. In his Nobel lecture he also described a scheme for glasses-free three-dimensional cinema using a holographic screen.

Reviewed 21 October 2026. Biography, holography history, honours and VR/AR research claims checked against the Nobel autobiography, lecture and presentation speech, Britannica, ETHW, Lemelson-MIT, SPIE, Google Patents, Eduline, Crossref metadata and full text of the cited review and research papers. About review dates.

Early life and education

Gabor was born in Budapest on 5 June 1900, the eldest son of Bertalan Gabor, director of a mining company, and his wife Adrienne. The Lemelson-MIT Program notes that at about the age of ten he designed an airplane-like carousel, for which his parents helped him obtain a patent. In his Nobel autobiography he wrote that his interest in physics began suddenly at 15, that he learned calculus before entering university, and that he was fascinated by Ernst Abbe's theory of the microscope and by Gabriel Lippmann's method of colour photography, "which played such a great part in my work, 30 years later". With his brother George he set up a small home laboratory to repeat experiments with wireless, X-rays and radioactivity.

Because physics was not yet a profession in Hungary, he studied electrical engineering. He received his diploma from the Technische Hochschule Berlin in 1924 and his Dr.-Ing. in 1927, while attending physics lectures at the University of Berlin, where Albert Einstein, Max Planck, Walther Nernst and Max von Laue were teaching. His doctoral work was the development of one of the first high-speed cathode-ray oscillographs, and in the course of it he made the first iron-shrouded magnetic electron lens. The Lemelson-MIT Program gives the thesis title as "Recording of Transients in Electric Circuits with the Cathode Ray Oscillograph".

Career

Siemens & Halske, 1927-1933

Gabor joined Siemens & Halske AG in Berlin in 1927. There he developed a high-pressure quartz mercury lamp with superheated vapour and a molybdenum tape seal, which he later wrote was "since used in millions of street lamps". He called it his first exercise in serendipity, because he had been trying to build a cadmium lamp. When Adolf Hitler came to power in 1933, Gabor left Germany and, after a short period in Hungary, moved to England.

British Thomson-Houston, 1934-1948

In 1934 he was taken on by the British Thomson-Houston Company (BTH) in Rugby on an inventor's agreement covering a gas discharge tube of his own design. The tube emitted mostly short-wave ultraviolet light and was not efficient with the fluorescent powders then available, but the work gave him a place in the BTH Research Laboratory, where he stayed until the end of 1948. Britannica notes that he later became a British subject. In 1936 he married Marjorie Louise Butler of Rugby.

Gabor described the post-war years at BTH as his most fruitful. He wrote his first papers on communication theory, including "Theory of communication" in the Journal of the Institution of Electrical Engineers (1946), and developed a system of stereoscopic cinematography. In his Nobel lecture he said he had spent "some years of work" on three-dimensional cinematography without viewing aids before holography, and had concluded that it could not be solved for large screens and theatres with lenticules, mirrors or prisms: large lenticules would be visible from the front seats, while small ones would lack definition for the back seats.

Invention of holography

In 1947 electron microscopes were limited by the spherical aberration of their magnetic lenses. In his Nobel lecture Gabor gave the theoretical resolution limit at that time as about 4 angstroms, "just about twice what was needed to resolve atomic lattices", and the practical limit as about 12 angstroms. He wrote that the solution came to him "one fine day at Easter 1947": take an electron picture that is optically poor but contains "the whole information", and correct it afterwards by optical means. An ordinary photograph records only intensity and loses the phase of the wave, so he proposed adding a coherent "reference wave" to the object wave. The interference fringes between the two encode the phase, and illuminating the developed record with the reference wave alone reconstructs the object wave. He named the record a "hologram", from the Greek holos (whole), "because it contained the whole information". BTH filed British patent GB685286, "Improvements in and relating to microscopy", on 17 December 1947; it was published in 1952.

Because BTH was an electrical engineering firm, Gabor obtained permission for the optical experiments on the grounds that its sister company Metropolitan-Vickers made electron microscopes. With his assistant Ivor Williams he used a high-pressure mercury lamp, which had a coherence length of only 0.1 mm, and illuminated a pinhole 3 micrometres in diameter with a single mercury line to obtain spatial coherence. This yielded holograms about 1 cm across of microphotographs about 1 mm across, with exposures of a few minutes. The short coherence length forced the object, plate and source onto one axis, an arrangement now called in-line holography, and every reconstruction contained a second, overlapping image (later called the twin image) that could be separated from the first only by focusing. The first results appeared in Nature in 1948, followed by the full theory in "Microscopy by reconstructed wave-fronts" in the Proceedings of the Royal Society (1949) and a second part in the Proceedings of the Physical Society (1951). The Nobel presentation speech said that in these three papers "he attained an exact analysis of the method, and his equations, even today, contain all the necessary information".

From 1950 to 1953 Gabor, by then at Imperial College, took part as a consultant in a programme of holographic electron microscopy at the Associated Electrical Industries research laboratory in Aldermaston, directed by T. E. Allibone, with M. W. Haine, J. Dyson and T. Mulvey. The microscope was improved, but the programme was abandoned because vibration, stray magnetic fields, stage creep and specimen contamination, worsened by long exposures in the weak coherent beam, mattered more than lens aberrations. "We had started too early," he said in 1971. With W. P. Goss he built a holographic interference microscope, but the optical industry showed so little interest that they did not publish it until 1966. By his account holography went into "a long hybernation" around 1955. In a footnote to the lecture he recalled that in 1950 he had thought of a pulsed laser, a crystal resonator pumped through a small hole and discharged by its own light, and had offered it as a Ph.D. problem to his best student, who declined it as too risky.

Revival with the laser

The revival came in 1963 with the first laser holograms by Emmett Leith and Juris Upatnieks at the University of Michigan. Their skew (off-axis) reference beam separated the two reconstructed images by angle, and the helium-neon laser's coherence length exceeded that of the mercury lamp by a factor of about 3,000, according to Gabor. In 1962 the Soviet physicist Yuri Denisyuk had published a method combining holography with Lippmann's colour photography, the basis of the reflection hologram; lacking a laser, he could produce only what Gabor called an "existence proof". According to Gabor, the first two-colour reflection hologram that could be viewed in white light was made in 1965 by G. W. Stroke and A. Labeyrie. The 1971 presentation speech dated holography's breakthrough to the arrival of the laser, and noted that at about the same time a group at the University of Michigan led by Leith solved the problem of the disturbing double image.

Imperial College, 1949-1967

On 1 January 1949 Gabor joined the Imperial College of Science and Technology in London as Reader in Electronics. Britannica dates his appointment as Professor of Applied Electron Physics to 1958; he held the chair until he retired in 1967. With his doctoral students he explained Langmuir's paradox (the unexpectedly strong apparent electron interaction in low-pressure mercury arcs), built a Wilson cloud chamber that could measure particle velocities, and developed a holographic microscope, an electron-velocity spectroscope, an analogue "learning" predictor for time series, a flat thin colour television tube and a new type of thermionic converter. His theoretical work covered communication theory, plasma theory and magnetrons.

CBS Laboratories and later work

After retiring, Gabor remained at Imperial as a Senior Research Fellow and became a staff scientist at CBS Laboratories in Stamford, Connecticut, where he worked with its president, his lifelong friend Peter C. Goldmark, on "many new schemes of communication and display". He continued to publish on holography. In "Laser Speckle and Its Elimination" (IBM Journal of Research and Development, 1970) he proposed a way to remove laser speckle from diffuse microholograms used for data storage and display.

From 1958 he also gave much of his time to the future of industrial civilisation, arguing that technology had outpaced social institutions and that inventive minds should treat social inventions as their first priority. He set out these views in three books: Inventing the Future (1963), Innovations (1970) and The Mature Society (1972). The Nobel presentation speech mentioned his "activity as a writer on culture".

Holographic display proposals

Gabor's 1971 Nobel lecture, "Holography, 1948-1971", ended with two display schemes that he described as his favourite holographic brainchildren.

• Panoramic holography: a reflection hologram on a wall that would act "like a window through which one looks at a landscape, real or imaginary", extending to any distance. An artist would build a model distorted so that it appears in correct perspective through a large lens, and the hologram would be recorded through that lens. Gabor said the scheme was under development but that the reflectance of three-colour holograms first had to be greatly improved.
• 3-D cinematography with a holographic screen: a cinema screen coated with a Lippmann emulsion and recorded so that the picture from a left projector is seen only from the left-eye viewing zones and the picture from a right projector only from the right-eye zones. This uses the directional selectivity of volume (Lippmann-Denisyuk) holograms, so that each eye sees one image of a stereo pair without glasses. To avoid making a hologram the size of a theatre screen, he proposed assembling the screen from small pieces recorded with a model of the theatre. He said he was "not sure whether they will be overcome in this century, or in the next".

The second scheme addressed the same goal as autostereoscopic displays: a separate image for each eye without viewing aids. In a 1980 SPIE proceedings paper, quoted in a 2023 SPIE retrospective, Emmett Leith wrote that Gabor "actively pursued holography with a vigor that was truly astonishing" and that he "conceived a workable holographic movie system".

Holography in VR and AR

Optics researchers trace the holographic components and displays studied for virtual reality and augmented reality back to Gabor's principle. A 2020 review of holographic optical elements (HOEs) for AR by Jianghao Xiong, Kun Yin, Kun Li and Shin-Tson Wu dates holography to "its invention by Dennis Gabor in 1948". It notes that, because they can manipulate wavefronts, HOEs have found uses in data storage, solar concentration, imaging and display. The authors explain that see-through AR optics must deliver high-fidelity images while keeping the real world visible, which creates problems of field of view, eye box size, contrast and focus cues, and that HOE-based AR systems have been proposed to address them.

A 2022 review of computer-generated holography by Dapu Pi, Juan Liu and Yongtian Wang in Light: Science & Applications also begins with Gabor: "Holography was invented by Denis Gabor in 1947 to improve the resolution of electron microscopy". It notes that the on-axis method was held back by the twin image until Leith and Upatnieks separated the two images in 1962. The authors describe holographic 3D display as able to "reconstruct all information of a real or virtual scene". Among early milestones of computer-generated holography they list the detour-phase method devised by Lohmann and Brown in 1966 to encode optical wavefronts into holograms by computer.

Near-eye holographic displays compute a hologram for each frame and show it on a spatial light modulator. In 2017 Andrew Maimone, Andreas Georgiou and Joel Kollin of Microsoft Research presented VR and AR near-eye display designs based on phase-only holographic projection. Their GPU implementation computed holograms in real time (90 Hz or more) with per-pixel focal control, and a calibrated model corrected focus, aberrations and the viewer's vision. The authors used this correction to enable compact, eyeglasses-like designs with 80-degree fields of view, evaluated across a series of hardware prototypes, and noted that combining all features in a single device remained a challenge. In 2024 Manu Gopakumar, Gordon Wetzstein and colleagues at Stanford University, the University of Hong Kong and NVIDIA published a full-colour holographic AR prototype in Nature. It combined inverse-designed metasurface gratings in a compact waveguide with artificial-intelligence-driven holography algorithms. The authors stated that, unlike conventional AR glasses, their design "can provide full 3D depth cues for virtual content".

Honours

Year	Honour
1956	Fellow of the Royal Society
1964	Honorary Member of the Hungarian Academy of Sciences; D.Sc., University of London
1967	Thomas Young Medal of the Physical Society of London; Cristoforo Colombo Prize of the International Institute of Communications, Genoa
1968	Albert Michelson Medal of the Franklin Institute, Philadelphia; Rumford Medal of the Royal Society
1970	IEEE Medal of Honor, "For his ingenious and exciting discovery and verification of the principles of holography"; Commander of the Order of the British Empire; honorary D.Sc., University of Southampton
1971	Nobel Prize in Physics; Prix Holweck of the French Physical Society; honorary D.Sc., Delft University of Technology

Death and legacy

Gabor died in London in February 1979. The Nobel Foundation and Britannica give the date as 8 February, while the Royal Society's biographical memoir by T. E. Allibone and the IEEE History Center give 9 February.

On 12 June 2013 the IEEE dedicated a Milestone plaque, "The Invention of Holography, 1947", at the entrance to the Department of Electrical and Electronic Engineering building at Imperial College London. Its citation states that implementation of his idea "required coherent light sources and had to await the emergence of the laser some years later". In Hungary, the Gábor Dénes Prize, founded in 1989 and named after him, recognises scientific and technical achievements.

Selected publications

Year	Title	Venue
1946	"Theory of communication. Part 1: The analysis of information"	Journal of the Institution of Electrical Engineers, Part III, vol. 93
1948	"A New Microscopic Principle"	Nature, vol. 161
1949	"Microscopy by reconstructed wave-fronts"	Proceedings of the Royal Society of London, Series A, vol. 197
1951	"Microscopy by Reconstructed Wave Fronts: II"	Proceedings of the Physical Society, Section B, vol. 64
1970	"Laser Speckle and Its Elimination"	IBM Journal of Research and Development, vol. 14
1971	"Holography, 1948-1971" (Nobel lecture)	Nobel Foundation

See also

• Holography
• Hologram
• Holographic display
• Holographic optical element
• Computer-generated holography