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Средняя яркость vs. Средняя освещенность

English translation: average luminance vs. average illuminance

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12:09 Oct 28, 2011

Russian to English translations [PRO]
Tech/Engineering - Engineering (general)

Russian term or phrase: Средняя яркость vs. Средняя освещенность

Стандарты освещения:

Средняя яркость покрытий тротуаров, примыкающих к проезжей части улиц, дорог и площадей городских поселений, должна быть не менее половины средней яркости покрытия проезжей части этих улиц, дорог и площадей, приведенной в таблице 15.

....
Средняя освещенность покрытий тротуаров, примыкающих к проезжей части улиц, дорог и площадей, должна быть не менее половины средней освещенности покрытия проезжей части этих улиц, дорог и площадей, установленной в таблице 15.

Это разные пункты.

Спасибо.

Nadezhda Wenzel KudoZ activity Questions: 3098 (15 open) (34 without valid answers) (147 closed without grading) Answers: 298 Russian Federation
Local time: 17:28

English translation:average luminance vs. average illuminance

Explanation:
luminance (brightness) is measured in candela per square meter
illuminance (illumination) is measured in lux

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Note added at 33 mins (2011-10-28 12:43:06 GMT)
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Brightness is a deprecated term in photometry.
Brightness

(Term of photometry)

The subjective description of luminance.
A perceived characteristics of objects which does not vary directly in a simple mathematical relationship with their physical or measured brightness, which is corretly termed their luminance.

The term brightness is often misused to mean luminance. If so, it should be qualified as "measured" brightness, to distinguish between the absolute attributes ("measured" brightness) and the perceived attributes ("apparent" of "subjective" brightness) of the object in question.

Selected response from:

Jack Slep
Local time: 11:28

Grading comment

Спасибо!
4 KudoZ points were awarded for this answer

Summary of answers provided

5 +9

average luminance vs. average illuminance

Jack Slep

5 +2

average brightness vs. average illuminance

Ravindra Godbole

3 +4

average brightness vs. average illumination

Denis Shepelev

Summary of reference entries provided

Освещенность и яркость

Victoria Lubashenko

Яркость

kapura

Answers

5 mins confidence:

peer agreement (net): +4

average brightness vs. average illumination

Explanation:
.

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Note added at 6 mins (2011-10-28 12:15:30 GMT)
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Roadway brightness and illumination

http://www.ies.org/PDF/100Papers/098.pdf

Denis Shepelev
Local time: 18:28
Native speaker of:

Bulgarian,

Russian
PRO pts in category: 4

20 mins confidence:

peer agreement (net): +2

average brightness vs. average illuminance

Explanation:
-----------

Ravindra Godbole
India
Local time: 20:58
Specializes in field
Native speaker of:

Marathi,

English
PRO pts in category: 29

13 mins confidence:

peer agreement (net): +9

average luminance vs. average illuminance

Jack Slep
Local time: 11:28
Works in field
Native speaker of:

English
PRO pts in category: 72

Grading comment

Спасибо!

Reference comments

14 mins

Reference: Освещенность и яркость

Reference information:
Освещённость — физическая величина, численно равная световому потоку, падающему на единицу поверхности. В отличие от освещённости, выражение количества света, отражённого поверхностью, называется яркостью.

Reference: http://ru.wikipedia.org/wiki/%D0%9E%D1%81%D0%B2%D0%B5%D1%89%...

Victoria Lubashenko
Ukraine
Works in field
Native speaker of:

Russian,

Ukrainian
PRO pts in category: 8

4 hrs

Reference: Яркость

Reference information:
Я́ркость — это поток, посылаемый в данном направлении единицей видимой поверхности в единичном телесном угле. Отношение силы света, излучаемого поверхностью, к площади её проекции на плоскость, перпендикулярную оси наблюдения. Или — характеристика светящихся тел, равная отношению силы света в каком-либо направлении к площади проекции светящейся поверхности на плоскость, перпендикулярную этому направлению. В системе СИ измеряется в канделах на м².
http://ru.wikipedia.org/wiki/Яркость

Luminance
Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through or is emitted from a particular area, and falls within a given solid angle. The SI unit for luminance is candela per square metre (cd/m2). A non-SI term for the same unit is the "nit". The CGS unit of luminance is the stilb, which is equal to one candela per square centimetre or 10 kcd/m2.
http://en.wikipedia.org/wiki/Luminance

Brightness
Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light.[1] In other words, brightness is the perception elicited by the luminance of a visual target. This is a subjective attribute/property of an object being observed.
http://en.wikipedia.org/wiki/Brightness

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Note added at 4 час (2011-10-28 16:55:30 GMT)
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Illuminance
In photometry, illuminance is the total luminous flux incident on a surface, per unit area. It is a measure of the intensity of the incident light, wavelength-weighted by the luminosity function to correlate with human brightness perception. Similarly, luminous emittance is the luminous flux per unit area emitted from a surface. Luminous emittance is also known as luminous exitance.[1]

In SI derived units these are measured in lux (lx) or lumens per square metre (cd·sr·m−2). In the CGS system, the unit of illuminance is the phot, which is equal to 10,000 lux. The foot-candle is a non-metric unit of illuminance that is used in photography.[2]

Illuminance was formerly often called brightness, but this leads to confusion with other uses of the word. "Brightness" should never be used for quantitative description, but only for nonquantitative references to physiological sensations and perceptions of light.
http://en.wikipedia.org/wiki/Illuminance

kapura
Czech Republic
Works in field
Native speaker of:

Russian

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Средняя яркость vs. Средняя освещенность

English translation: average luminance vs. average illuminance

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Средняя яркость vs. Средняя освещенность

English translation: average luminance vs. average illuminance

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KudoZ™ translation helpThe KudoZ network provides a framework for translators and others to assist each other with translations or explanations of terms and short phrases.

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