troland

A unit of visual stimulation at the retina equal to the illumination per square millimeter of pupil received from a surface of 1 lux brightness.

* * *

tro·land 'trō-lənd n PHOTON (1)
Troland Leonard Thompson (1889-1932)
American psychologist and physicist. Troland was a university instructor of psychology and a practical engineer. He devised most of the photographic and mechanical apparatus for color motion pictures. In 1922 he wrote a monograph summarizing the current state of visual science. In 1929 and 1930 he published a major two-volume treatise on the principles of psychophysiology.

* * *

tro·land (troґlənd) [for Leonard Thompson Troland, American psychologist and physicist, 1889–1932] the retinal illuminance produced by the image of an object the luminance of which is 1 lumen per square meter for an area of the entrance pupil of 1 square millimeter.

Medical dictionary. 2011.

Look at other dictionaries:

  • Troland — Einheit Norm Einheitenname Troland Einheitenzeichen td Beschriebene Größe(n) Retinale Beleuchtungsstärke Dimensionssymbol …   Deutsch Wikipedia

  • Troland — The troland (symbol Td), named after L.T. Troland, is a unit of conventional retinal illuminance . It is meant as a method for correcting photometric measurements of luminance values impinging on the human eye by scaling them by the effective… …   Wikipedia

  • Troland — L.T., U.S. physicist, 1889–1932. See t.. * * * tro·land trō lənd n PHOTON (1) Troland Leonard Thompson (1889 1932) American psychologist and physicist. Troland was a university instructor of psychology and a practical engineer. He devised most of …   Medical dictionary

  • troland — (Td)    a unit used in photometry to measure the amount of light reaching the retina of the eye. The retinal illuminance in trolands is equal to the luminance of the light shining on the eye, measured in candelas per square meter (cd/m2),… …   Dictionary of units of measurement

  • Troland — n. family name; Leonard Thompson Troland (1889 1932), United States psychologist and physicist, inventor of most of the photographic and mechanical devices for the movies …   English contemporary dictionary

  • troland — ˈtrōlənd noun ( s) Etymology: after Leonard T. Troland died 1932 American psychologist and physicist : photon 2 …   Useful english dictionary

  • troland — n. unit in photometry for measuring the amount of light that reaches the retina of the eye …   English contemporary dictionary

  • troland — tro·land …   English syllables

  • Leonard Thompson Troland — n. (1889 1932) United States psychologist and physicist, inventor of most of the photographic and mechanical devices for the movies …   English contemporary dictionary

  • Technicolor (Verfahren) — Technicolor ist ein Farbfilm Verfahren, das als erstes als technisch befriedigend und rentabel galt. Mit der Bezeichnung Technicolor wurden verschiedene Aufnahme und Wiedergabe Verfahren entwickelt. Weltweit am bekanntesten wurde der Prozess 4,… …   Deutsch Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.