Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A unit (symbol Td) of conventional retinal illuminance, intended as a means of correcting photometric measurements of luminance values impinging on the human eye by scaling them by the effective pupil size.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Named after Leonard T. Troland.

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