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footlambert |
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footlambert [′fu̇t ¦lam·bərt] (optics) A unit of luminance (photometric brightness), equal to 1/π candela per square foot, or to the uniform luminance of a perfectly diffusing surface emitting or reflecting light at the rate of 1 lumen per square foot; equal to approximately 3.42625 nit. Abbreviated ft-L. Also known as equivalent footcandle. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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High luminance backlights using heated cathodes are currently used for avionic AMLCD applications, with light output in the 10,000 footlambert range; however, they are relatively inefficient and have other environmental limitations. |
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