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Nobel Jews
Portrait of Dennis Gabor
Photo: Associated Press, [1] · Public domain via Wikimedia Commons

Nobel Prize in Physics · 1971

Dennis Gabor

A refugee engineer who invented holography, a way to record the whole of a light wave, now used to test machines and guard money.

The Nobel citation: “for his invention and development of the holographic method”
Born
June 5, 1900, Budapest, Hungary
Died
February 8, 1979, London, United Kingdom
Affiliation at the time
Imperial College, United Kingdom

Physics prize

1971

Awarded alone.

Age that year

71years

Born in 1900.

Headline credited impact

$2.5–3.5billion in economic value

Global sales of security holograms for banknotes, cards, IDs and products (1985-2025). How it was built

Sources cited

22

Fact-checked September 24, 2026.

  • By his own account, he conceived holography at Easter 1947 while sitting on a bench at his local tennis club. His goal was a sharper electron microscope.
  • In World War II Britain classed him as an enemy alien. He worked in a hut outside his company's security fence, shut out of its secret radar work.
  • He named the hologram from the Greek 'holos', meaning whole, because it records the whole light wave, not just its brightness.
  • By his own account, he thought of a pulsed laser in 1950 and offered it as a PhD project. His best student declined, judging it too risky.
  • By the late 1950s his idea had been written off as a 'white elephant'. Researchers in America and the Soviet Union revived it, and it won him an unshared Nobel Prize.

The breakthrough

Holography: recording the whole light wave (1947-1948)

A photograph records only how bright light is at each point. It loses the light wave's phase: where each wave is in its rise and fall when it arrives. Phase carries the information about distance and depth, so a photo comes out flat. At Easter 1947, Gabor saw a way to keep it. Shine a second, clean 'reference' beam onto the plate alongside the light coming from the object. Where the two waves meet, they add up or cancel, leaving a fine pattern of stripes that stores the phase in code. Light the developed plate with the reference beam alone, and it rebuilds the original wave, so you see the object in depth. Think of the reference beam as a metronome: by comparing every wave with the same steady beat, the plate captures not just how loud each one is but exactly when it arrives. Gabor called the plate a hologram, from the Greek for 'whole'. He wanted to use it to sharpen electron microscopes. His first tests used a filtered mercury lamp shone through a pinhole 3 thousandths of a millimetre wide. The holograms were about a centimetre across, and the images were blurred by a ghostly second image. The idea sat mostly unused until the laser arrived in 1960. Emmett Leith and Juris Upatnieks then used laser light and an angled reference beam to make sharp 3D holograms.[3],[4],[6],[9],[14]

“I am one of the few lucky physicists who could see an idea of theirs grow into a sizeable chapter of physics.”
Dennis Gabor, From the closing paragraph of his Nobel Lecture, 'Holography, 1948-1971', Stockholm, 11 December 1971.[3]

What it meant for humanity

Holography took decades to find its uses, and they turned out different from what Gabor expected. His aim, sharper electron microscopes, stalled in the 1950s. Once lasers arrived, holography became a precise measuring tool. Two holograms of the same object, taken before and after a tiny change, show stripes wherever it moved, by as little as half a wavelength of light. By 1971 Gabor called this kind of non-destructive testing holography's most important industrial use. It found hidden flaws in car tyres and in the honeycomb panels used in aircraft wings. From the 1980s, cheap embossed holograms, stamped out in huge numbers on metal foil, spread into packaging and security. On credit cards, banknotes and ID documents they make forgery harder. One market study valued security holograms at $4.7 billion in 2025, with banknotes the largest single use. In laboratories, digital holography now measures living cells without dyes, for example imaging blood from a sickle-cell patient right through its collection bag, and it helps engineers watch chips being made. Gabor's post-war work on communication theory had its own long reach. He found the signal shapes that are pinned down in both time and pitch as sharply as mathematics allows. Now called Gabor wavelets, their two-dimensional versions are at the heart of John Daugman's iris-recognition software. Holography also drew artists and crowds, and exhibitions attracted tens of thousands of visitors in the 1980s. Gabor himself spent his later years arguing that inventors should make social problems their first priority.

  • In his 1971 Nobel lecture Gabor called holographic non-destructive testing its most important industrial use. Double exposures showed bad bonding in car tyres as blisters only micrometres high.[3],[9]
  • From the 1980s, embossed holograms mass-produced on metal foil made credit cards and banknotes harder to forge. A 2025 market study put security-hologram sales at $4.7 billion a year, 31% of it for banknotes.[9],[17]
  • Digital holography measures living cells without stains, including blood from a sickle-cell patient imaged through its collection bag, and is used to monitor semiconductor manufacturing.[15]
  • Two-dimensional Gabor wavelets, based on the signal shapes Gabor identified in his communication theory, encode iris patterns in John Daugman's algorithms, used to enroll at least 1.5 billion people in national ID and benefits schemes by 2018.[16],[20],[21]
  • Holography's boom years produced about 1,000 PhDs, 7,000 patents and 20,000 papers, by historian Sean Johnston's count.[10]

Impact in numbers

Holography's value is real but hard to total. Its biggest markets, security holograms and decorative foils, arrived decades after Gabor's 1947 idea. They also depended on lasers, on Leith and Upatnieks's method, on Stephen Benton's white-light rainbow holograms and on cheap embossing. Its scientific uses, from measuring vibration and strain to imaging living cells, save time and money in ways no one has added up. We therefore count one measurable slice: cumulative global sales of security holograms since 1985, credited one twentieth to Gabor. That leaves out holographic testing, optics and microscopy, and his communication theory, whose 'Gabor wavelets' now run inside iris scanners. Sales are not the same as value to society, and the market estimate comes from a commercial research firm, so the claim is low confidence. Gabor's other legacy is harder still to measure. At the Nobel banquet he suggested that science had made the world a better place but had failed to make it a safer one, and he spent his last years urging inventors to put social problems first.

TechnologyFundamental scienceEconomy

Each number is the laureate’s credited share of a real-world outcome, cumulative to 2025. The whole outcome, the share of credit, and the reasoning are shown so you can check the arithmetic. Outcomes shared with other laureates are counted once on the impact page.

  • Low confidenceRippleModeledEconomy

    Global sales of security holograms for banknotes, cards, IDs and products (1985-2025)

    $2.5–3.5

    billion in economic value, credited share

    That is 5% of $50–70 billion in economic value since 1985.

    How this number was built

    FMI (2025) values security-hologram sales at $4.73B in 2025; the trade body IOTA calls optical security a billion-dollar industry. Embossed holograms spread from the 1980s (Johnston), so we backcast from 1985: sum of 4.73B/(1+g)^k for k=0..40. At g=6.6%/yr (FMI's forecast growth; 1985 market ~$0.37B) the total is $70.8B; at g=10%/yr (1985 ~$0.10B) it is $51.0B. Range $50B-$70B, treated as 2024 dollars. Security holograms only; packaging foils, optics, testing and microscopy excluded. Share 0.05: Gabor invented the principle, but these products also needed the laser, Leith and Upatnieks's off-axis method, Benton's rainbow holograms behind embossing and mass replication; about half the market is dot-matrix and strip products; and sales mostly pay for materials and manufacturing. Sales are not net social value.[3],[9],[17],[18]

    Sources: Future Market Insights; International Optical Technologies Association; Taylor & Francis (author copy, University of Glasgow ePrints); NobelPrize.org

The double edge

No serious harm has been traced to holography itself, but its history has shadows. The practical revival of Gabor's idea came out of classified US military research. Emmett Leith reached holography through radar imaging for the armed forces, and the first company to push holography commercially grew out of military contract work. During the Cold War, researchers in both the US and the Soviet Union explored holographic image processing that could not be acknowledged in public. The field was also oversold. Promoters promised holographic television and the end of ordinary photography, drawing investment into products that never came. Finally, the Dictionary of Scientific Biography records that Gabor, deeply worried about overpopulation, agreed with much of what British eugenicists argued. His books on the future warned of overpopulation, nuclear weapons and the strains of a leisure society.

  • Minor

    Military roots of practical holography

    Emmett Leith came to holography through classified synthetic-aperture radar research at the University of Michigan's Willow Run Laboratories, which kept doing secret optical processing for the US Defense Department. Conductron, the first company to explore holography commercially, was staffed from Willow Run and first supported by military contracts, and US and Soviet labs pursued holographic image processing in secret.[9],[10]

  • Minor

    Oversold promises

    In the 1960s, promoters billed holography as lensless 3D photography and forecast holographic television and home movies. Spectacular predictions drew investment but few viable products. Historian Sean Johnston notes that holography never replaced photography, and that the 'holograms' of science fiction and social media bear little resemblance to the real thing.[9],[10]

  • Minor

    Sympathy for eugenic ideas

    According to the Dictionary of Scientific Biography, Gabor feared overpopulation and agreed with many views of the British eugenicists, influenced by writers such as Julian Huxley and Charles Galton Darwin. The source does not describe him promoting specific eugenic laws.[6]

Against the odds

Gabor grew up in Budapest's Jewish middle class, in an anti-religious home, and his family became Lutheran in 1918. In 1920 Hungary's new right-wing government passed the numerus clausus law, which limited the number of Jewish university students. It was the first anti-Jewish law in Europe after World War I. Around then Gabor left Budapest to finish his engineering studies in Berlin; the Dictionary of Scientific Biography says he would not register for military service under the reactionary regime. In Berlin he built a career at Siemens. Within weeks of Hitler taking power in 1933, Siemens ended his contract. From 1935 Nazi race law defined Jews by their grandparents' religion, so conversion offered no protection. He spent a year in Hungary and reached England in 1934, in the depths of the Depression, when jobs for foreigners were scarce. He got a foothold at British Thomson-Houston only through an inventor's agreement for a lamp that never worked well, and he was the only refugee in its research laboratory. In World War II he was classed as an enemy alien, shut out of the firm's secret radar work and given a hut outside the security fence. His father died in Hungary in 1942, before the mass deportations of 1944; by the war's end about 550,000 Jews under Hungarian control had been killed. Gabor's great idea came in 1947. Within a decade it was written off, and it took the laser and new work in America and the Soviet Union to revive it.

  • 1920

    Quota

    In 1920 Hungary passed the numerus clausus law limiting Jewish university enrollment, the first anti-Jewish law in post-World War I Europe. Gabor, enrolled since 1918, left for Berlin around then; the DSB says he objected to registering for military service under the new reactionary government.[6],[12],[19]

  • 1933

    Dismissal

    Within weeks of Hitler's rise to power, Siemens & Halske ended his contract and he left Germany. From 1935 Nazi law counted anyone with three or four Jewish grandparents as a Jew, judged by the grandparents' religion.[2],[6],[8],[13]

  • 1934

    Exile

    He reached England in 1934, when the Depression made jobs for foreigners very hard to find, and got a start at British Thomson-Houston only through an inventor's agreement. He was the only refugee employed in its research laboratory.[2],[6]

  • 1939

    War

    During World War II he was classed as an enemy alien, excluded from war work such as the magnetron for radar, and placed in a hut outside the security fence. Nature was the only journal he could get regularly.[6],[8]

  • 1944

    Persecution

    His native Hungary passed anti-Jewish laws from 1938; the 1939 law defined Jews by race, reaching people who did not see themselves as Jewish. About 550,000 of the 825,000 Jews under Hungarian control were killed in the Holocaust.[12]

Jewish background

Both parents JewishConverted to another faith

Gabor was born Günszberg Dénes in Budapest, the eldest of three sons of a mining-company director. In 1902 his father got permission to change the family name to Gábor. Historian Sean Johnston describes him as of Jewish origin, and the Dictionary of Scientific Biography says he grew up among Budapest's Jewish middle class. Gabor later wrote that he grew up in an anti-religious atmosphere. The family became Lutheran in 1918. He nominally kept that faith, but he called himself an agnostic and religion played little part in his life. The Encyclopaedia Judaica has an entry on him.[2],[6],[7],[8],[19]

Key dates

  1. June 5, 1900

    Born Günszberg Dénes in Budapest, Hungary, the eldest son of a mining-company director. The family name is changed to Gábor in 1902.[1],[2],[19]

  2. 1918

    After brief artillery service at the end of World War I, enrolls in mechanical engineering at the Budapest technical university.[6],[8]

  3. 1927

    Earns an engineering doctorate in Berlin for a fast cathode-ray oscillograph, then joins Siemens & Halske to work on lamps.[2],[6]

  4. 1933

    Leaves Germany after Hitler comes to power; Siemens has ended his contract. Spends a year working on a lamp invention in Hungary.[2],[6],[8]

  5. 1934

    Moves to England and joins the British Thomson-Houston research laboratory in Rugby on an inventor's agreement.[2],[6]

  6. August 8, 1936

    Marries Marjorie Louise Butler, a fellow employee at British Thomson-Houston. They have no children.[2],[6]

  7. 1939

    With the outbreak of war he is cut off from the firm's mostly classified work and housed in a hut on the edge of the restricted area.[6],[8]

  8. October 14, 1946

    Becomes a naturalised British citizen; the London Gazette lists 'Gabor, Denes (known as Dennis Gabor)', research engineer of Rugby.[11],[22]

  9. 1947

    At Easter, by his own account, conceives 'wavefront reconstruction', later called holography. In July he begins optical experiments with assistant Ivor Williams.[3],[6]

  10. May 15, 1948

    Nature publishes his note 'A New Microscopic Principle', the first public report of holography.[6],[14]

  11. January 1, 1949

    Joins Imperial College London as Reader in Electronics, later becoming Professor of Applied Electron Physics until 1967.[2]

  12. May 1964

    Emmett Leith and Juris Upatnieks show laser-lit 3D holograms at an Optical Society of America meeting, reviving his neglected idea.[3],[9]

  13. December 10, 1971

    Receives the unshared Nobel Prize in Physics for the holographic method. At the banquet he suggests Nobel would see that science had made the world better but not safer.[1],[4],[5]

  14. February 8, 1979

    Dies in London, about four and a half years after a 1974 stroke left him unable to read or write.[1],[6]

Sources

  1. 1.Dennis Gabor - Facts · NobelPrize.org (Nobel Prize Outreach)
  2. 2.Dennis Gabor - Biographical · NobelPrize.org (from Les Prix Nobel en 1971, Nobel Foundation, 1972), 1972
  3. 3.Holography, 1948-1971 (Nobel Lecture, 11 December 1971) · NobelPrize.org, 1971
  4. 4.Award ceremony speech, Nobel Prize in Physics 1971 (Erik Ingelstam) · NobelPrize.org, 1971
  5. 5.Dennis Gabor - Banquet speech (10 December 1971) · NobelPrize.org, 1971
  6. 6.Gabor, Dennis (S. T. Keith), Complete Dictionary of Scientific Biography · Gale (Charles Scribner's Sons), via Encyclopedia.com
  7. 7.Gabor, Dennis (J. Edwin Holmstrom), Encyclopaedia Judaica · Gale (Macmillan Reference USA), via Encyclopedia.com
  8. 8.From white elephant to Nobel Prize: Dennis Gabor's wavefront reconstruction (Sean F. Johnston), Historical Studies in the Physical and Biological Sciences 36(1):35-70 · University of California Press (author copy, University of Glasgow ePrints), 2005
  9. 9.Attributing scientific and technological progress: the case of holography (Sean F. Johnston), History and Technology 21(4):367-392 · Taylor & Francis (author copy, University of Glasgow ePrints), 2005
  10. 10.Holograms are no longer the future, but we must not forget them - here's why (Sean Johnston) · The Conversation (copy at University of Glasgow ePrints), 2016
  11. 11.Dennis Gabor F.R.S.: lecture notes, publications, biographical information and other papers, 1943-1989 (catalogue B/GABOR) · Imperial College London Archives
  12. 12.The Holocaust in Hungary · United States Holocaust Memorial Museum, Holocaust Encyclopedia
  13. 13.The Nuremberg Race Laws · United States Holocaust Memorial Museum, Holocaust Encyclopedia
  14. 14.A New Microscopic Principle (D. Gabor), Nature 161:777-778 · Nature, 1948
  15. 15.Quantitative phase imaging based on holography: trends and new perspectives (Z. Huang and L. Cao), Light: Science & Applications · Springer Nature, 2024
  16. 16.How Iris Recognition Works (John Daugman), IEEE Transactions on Circuits and Systems for Video Technology 14(1):21-30 · IEEE (author copy, University of Cambridge), 2004
  17. 17.Security Holograms Market Size and Share Forecast Outlook 2025 to 2035 · Future Market Insights, 2025
  18. 18.About us - International Optical Technologies Association (formerly the International Hologram Manufacturers Association) · International Optical Technologies Association
  19. 19.In Memoriam Gábor Dénes: életrajz (biography) · Library of the Hungarian Academy of Sciences
  20. 20.Major International Deployments of the Iris Recognition Algorithms: 1.5 Billion Persons (John Daugman) · University of Cambridge Computer Laboratory, 2018
  21. 21.Information Theory lecture notes (John Daugman), sections on Gabor's information diagram, logons and Gabor wavelets · University of Cambridge Computer Laboratory, 2020
  22. 22.Naturalisation list: 'Gabor, Denes (known as Dennis Gabor)', certificate dated 14 October 1946 · The London Gazette, issue 37798, page 5787 (26 November 1946), 1946

Fact-checked on September 24, 2026 by a separate AI fact-checking pass that re-opened the sources, with 12 corrections made. How we check

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