Wikia

Psychology Wiki

Troland

Talk0
34,140pages on
this wiki
Revision as of 23:45, May 18, 2010 by Dr Joe Kiff (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Assessment | Biopsychology | Comparative | Cognitive | Developmental | Language | Individual differences | Personality | Philosophy | Social |
Methods | Statistics | Clinical | Educational | Industrial | Professional items | World psychology |

Cognitive Psychology: Attention · Decision making · Learning · Judgement · Memory · Motivation · Perception · Reasoning · Thinking  - Cognitive processes Cognition - Outline Index


The troland (symbol Td), named after Leonard 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 pupil size.

The troland typically refers to the ordinary or photopic troland, which is defined in terms of the photopic luminance:

T = L·p

where L is the photopic luminance in cd/m2 and p is pupil area in mm2

A scotopic troland is also sometimes defined:

T′ = L′·p


This page uses Creative Commons Licensed content from Wikipedia (view authors).

Around Wikia's network

Random Wiki