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ft-l

/ˌef.tiː ˈel/

翻译: 一种已过时的亮度单位，等于每平方英尺一坎德拉或每平方英尺一流明。

1 个条目

noun

/ˌef.tiː ˈel/C2formalscientific
  • zh一种已过时的亮度单位，等于每平方英尺一坎德拉或每平方英尺一流明。

A former luminance unit equal to one lumen per square foot.

  1. Luminance unitC2formalscientific

    A former unit of luminance equal to one lumen per square foot, used to measure the brightness of a surface.

    zh英尺朗伯

    • The display's brightness was measured at 50 ft-L.
    • Older projectors often specified their output in foot-lamberts.
    • The calibration standard required a luminance of 30 ft-L.

    同义词foot-lambert