Glossary and Acronyms Help Wanted

[Sonnie]

Did you mean for "wave length" and "wavelength" to be this way with the space in the first one?

[nova]

How about 1080p, and class D amps.

[drf]

Sonnie wrote:

Did you mean for "wave length" and "wavelength" to be this way with the space in the first one?

No. Truth be told I am probably just overcomplicating things. I just thought that even though the actual definition and calculation for wavelength is the same for both, by not defining the difference between light and sound people who read the glossary could think the two are similar in others ways also. I found when studying that the number of people who treated sound as if it would react the same way as light was astounding.

Probably best to just leave it as it is.

[lcaillo]

Sonnie wrote:

Still looking for additions and/or corrections.

ITU
CIE
EBU
SMPTE
CCT
D65
Illuminant
Foot-Lambert
Lumen
Illuminance
Luminance
Luminous Flux
Luminous Intensity
Radiance
Constant Luminance

[Sonnie]

lcaillo wrote:

ITU
CIE
EBU
SMPTE
CCT
D65
Illuminant
Foot-Lambert
Lumen
Illuminance
Luminance
Luminous Flux
Luminous Intensity
Radiance
Constant Luminance

What? No definitions? You really wanna make me work huh?

[lcaillo]

If you think that these are appropriate entries I will put together the defininitions.

[Sonnie]

Absolutely!

[lcaillo]

ITU International Telecommunication Union http://www.itu.int/net/home/index.aspx

CIE Commission internationale de l'éclairage aka International Commission on Illumination
http://www.cie.co.at/index_ie.html

EBU European Broadcasting Union http://www.ebu.ch/

SMPTE Society of Motion Picture and Television Engineers http://www.smpte.org/home

CCT correlated color temperature - The temperature of a black body radiator that most closely resembles a given light source (Kelvin units)

D65 (correctly written with 65 subscripted) - The standard illuminant intended to represent daylight of the Northern Hemisphere sky defined by a table of spectrophotometric data over the range of visible light. It corresponds to a CCT of 6503.6K, or more significantly to display calibration, chromaticity coordinates for white of x=0.3128, y=0.3290.

Illuminant - There are two uses for the term that must be carefully distinguished. Alone, the term suggest the common useage referring to a source of light. Used as the term Standard Illuminant, or in the context of color science, it refers to a defined spectral density of visible light used as a reference for matching various light sources such as daylight. D65 is one standard illuminant, among many.

Foot-Lambert - a measure of luminance from a light source or reflected off of a surface equal to 1 Lumen per square foot.

Lumen - an SI unit of luminous flux, or perceived power, defined as 1 candela x 1 steradian cd·sr)

Illuminance - the measure of incident light on a surface describe in lux, a derived SI unit defined 1 lumen per square metre (cd·sr·m−2).

Luminance - is a measure of luminous intensity of light leaving a surface in a particular direction over a given angle of projection. The SI unit for luminance is candela per square metre (cd/m2, aka nits).

Luminous Flux - the total perceived power (weighted for the sensitivity of the eye over the range of visible light) of light in all directions, measured in Lumens.

Luminous Intensity - the perceived power (weighted for the sensitivity of the eye over the range of visible light) of a light source over a given solid angle, measured in candelas.

Radiance - the amount of light emitted from or passing through an area over a solid angle in a particular direction, measured in watts per steradian per square metre (W·sr-1·m-2).