personal blog about, well, various stuff…
Convert cdm2 to fL (foot Lambert)
Really useful converter for converting between cd/m2 (Candela per square meter) and fL/ftL (foot Lambert).
Just enter the values below and it will automatically convert from one unit to the other.
Candela per square meter – cd/m2
The candela (pronounced /kænˈdɛlə/ or /kænˈdiːlə/, symbol: cd) is the SI base unit of luminous intensity; that is, power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function). A common candle emits light with a luminous intensity of roughly one candela. If emission in some directions is blocked by an opaque barrier, the emission would still be approximately one candela in the directions that are not obscured.
Source: Wikipedia
Foot Lambert
A foot-lambert or footlambert (fL, sometimes fl or ft-L) is a unit of luminance in U.S. customary units and elsewhere. It is named after Johann Heinrich Lambert (1728 – 1777), a German mathematician, physicist and astronomer. The foot-lambert used to be used in the motion picture industry for the luminance of images on a projection screen.
Source: Wikipedia
Converter
When calibrating an LCD or plasma screen try to aim for the recommended white level of 100 – 120 cd/m2.
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“When calibrating an LCD or plasma screen try to aim for the recommended white level of 100 – 120 cd/m2″
Agree, but on plasma mdels white level rises with reducing white area, due to a power limiter. And i suppose that rising cell light only increase single cell voltage limit, but total power limit not change.