Edwin H. Land

Edwin Herbert Land
File:Edwinland.jpg Edwin Herbert Land
Born	May 7 1909 Bridgeport, Connecticut
Died	March 1 1991 Cambridge, Massachusetts
Nationality	American
Known for	polarizing light
Awards	Perkin Medal 1974

Edwin Herbert Land (May 7 1909 – March 1 1991) was an American scientist and inventor. Among other things, he invented inexpensive filters for polarizing light, a practical system of in-camera instant photography, and his retinex theory of color vision.

Biography

Early years

Edwin was born in Bridgeport, Connecticut to Harry and Helen Land. His father owned a scrap metal yard. He attended the Norwich Free Academy at Norwich, Connecticut, a semi-private high school, and graduated in the class of 1927. The library there was posthumously named for him, having been funded by grants from his family. He studied chemistry at Harvard. After his freshman year, he left Harvard for New York City.

In New York City, he invented the first inexpensive filters capable of polarizing light, Polaroid film. Because he was not associated with an educational institution, he lacked the tools of a proper laboratory, making this a difficult endeavor. Instead, he would sneak into a laboratory at Columbia University late at night to use their equipment.[1] He also availed himself of the New York City public library to scour the scientific literature for prior work on polarizing substances. His breakthrough came when he realized that instead of attempting to grow a large single crystal of a polarizing substance, he could manufacture a film with millions of micrometre-sized polarizing crystals that were coaxed into perfect alignment with each other.

After developing a polarizing film, Edwin Land returned to Harvard. However, he still did not finish his studies or receive a degree. Once Land could see the solution to a problem in his head, he lost all motivation to write it down or prove his vision to others.[2] Often his wife, at the prodding of his instructor, would extract from him the answers to homework problems. She would then write up the homework and hand it in so he could receive credit and not fail the course.

Land's company

In 1932 he established the Land-Wheelwright Laboratories together with his Harvard physics instructor to commercialize his polarizing technology. Wheelwright, his instructor, came from a family of financial means and agreed to fund the company. After a few early successes developing polarizing filters for sunglasses and photographic filters, Land obtained funding from a series of Wall Street investors for further expansion. The company was renamed the Polaroid Corporation in 1937. Land further developed and produced the sheet polarizers under the Polaroid trademark. Although the initial major application was for sunglasses and scientific work, it quickly found many additional applications: for color animation in the Wurlitzer 850 Peacock jukebox of 1942, for glasses in full-color stereoscopic (3-D) movies, to control brightness of light through a window, a necessary component of all LCDs, and many more. During World War II, he worked on military tasks, which included developing dark-adaptation goggles, target finders, the first passively guided smart bombs, and a special stereoscopic viewing system called the Vectrograph which revealed camouflaged enemy positions in aerial photography.

A little more than three years later, on February 21 1947, Edwin Land demonstrated an instant camera and associated film. Called the Land Camera, it was in commercial sale less than two years later. Polaroid originally manufactured sixty units of this first camera. Fifty-seven were put up for sale at Boston's Jordan Marsh department store before the 1948 Christmas holiday. Polaroid marketers incorrectly guessed that the camera and film would remain in stock long enough to manufacture a second run based on customer demand. All fifty-seven cameras and all of the film were sold on first day of demonstrations.

During his time at Polaroid, Land was notorious for his marathon research sessions. When Land conceived of an idea, he would experiment and brainstorm until the problem was solved with no breaks of any kind. He needed to have food brought to him and to be reminded to eat.[3] He once wore the same clothes for eighteen days straight while solving problems with the commercial production of polarizing film.[4] As the Polaroid company grew, Land had teams of assistants working in shifts at his side. As one team wore out, the next team was brought in to continue the work.

Later years

Hey In the 1950s, Edwin Land and his team helped design the optics of the revolutionary Lockheed U-2 spy plane. Also in this decade, Land first discovered a two-color system for projecting the entire spectrum of hues with only two colors of projecting light (he later found more specifically that one could achieve the same effect using very narrow bands of 500nm and 557nm light). Some of this work was later incorporated in his Retinex theory of color vision. In 1957, Harvard University awarded him an honorary doctorate, and Edwin H. Land Blvd., a street in Cambridge, Massachusetts, was later named in his memory. The street forms the beginning of Memorial Drive, where the Polaroid company building was located.

In the early 1970s, Land attempted to explain the previously known phenomenon of color constancy with his Retinex theory. His popular demonstrations of color constancy raised much interest in the concept. He considered his leadership towards the development of integral instant color photography — the SX-70 film and camera — to be his crowning achievement.

Although he led the Polaroid Corporation as a chief executive, Land was a scientist first and foremost, and as such made sure that he performed "an experiment each day". Despite the fact that he held no formal degree, employees, friends, and the press respected his scientific accomplishments by calling him Dr. Land. The only exception was the Wall Street Journal, which refused to use that honorific title throughout his lifetime.[5]

Land often made technical and management decisions based on what he felt was right as both a scientist and a humanist, much to the chagrin of Wall Street and his investors. From the beginning of his professional career, he hired women and trained them to be research scientists. Following the assassination of Martin Luther King, Jr. in 1968, he led Polaroid to the forefront of the affirmative action movement.

Despite the tremendous success of his instant cameras, Land's unsuccessful Polavision instant movie system was a financial disaster, and he resigned as Chairman of Polaroid on March 6, 1980. In his retirement years, he founded the Rowland Institute for Science.

Death

Land died on March 1, 1991 in Cambridge, Massachusetts, at the age of 81. Upon his death, his personal assistant shredded his personal papers and notes.[6]

Public service

Land was:

• A member of the President's Science Advisory Committee (PSAC) 1957–59 and a Consultant-at-Large of PSAC from 1960–1973.
• A member of the President's Foreign Intelligence Advisory Board (PFIAB) 1961–77.
• A member of the National Commission on Technology, Automation and Economic Progress 1964–66.
• A member of the Carnegie Commission on Educational Television 1966–67.
• A Trustee of the Ford Foundation 1967–1975.

Honors

Although Land never received a formal degree, he received honorary degrees from Harvard, Yale, Columbia, Carnegie Institute of Technology, Willams College, Tufts College, Washington University, Polytechnic Institute of Brooklyn, University of Massachusetts, Brandeis University and many others. He was awarded the Presidential Medal of Freedom, the highest award given to a U.S. citizen, in 1963 for his work in optics. He held 535 patents, compared with Thomas Edison's 1,097 American patents [7]. In 1977 he was inducted into the National Inventors Hall of Fame. In 1988 Land was awarded the National Medal of Technology for "the invention, development and marketing of instant photography".

See also

• Theory of Colours [8]

References

• Wensberg, P. C. (1987) Land's Polaroid: a company and the man who invented it Houghton Mifflin, New York, ISBN 0-395-42114-4
• McElheny, Victor K. (1999) Edwin Herbert Land: May 7, 1909-March 1, 1991 National Academy Press, Washington, D.C., ISBN 0-309-06644-1

Bibliography

• Land; Daw (1962), Binocular Combination of Projected Images., vol. 138 (published 1962 Nov 2), pp. 589–590, doi:10.1126/science.138.3540.589, PMID:17832004 {{citation}}: Check date values in: |publication-date= (help)
• Land; Hunt (1936), "THE USE OF POLARIZED LIGHT IN THE SIMULTANEOUS COMPARISON OF RETINALLY AND CORTICALLY FUSED COLORS.", Science, vol. 83, no. 2152 (published 1936 Mar 27), p. 309, doi:10.1126/science.83.2152.309, PMID:17749392 {{citation}}: Check date values in: |publication-date= (help)

External links

• Short biography
• "Generation of Greatness: The Idea of a University in an Age of Science", Ninth Annual Arthur Dehon Little Memorial Lecture at the Massachusetts Institute of Technology. May 22, 1957
• Edwin Herbert Land

Patents

• US2,435,720 -- Apparatus for exposing and processing photographic film