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Undid revision 1190772156 by Matthiaspaul (talk) Lambert is not an SI unit. Also, 3 dimensions listed with 3 units; one each. No need to list every possible unit that could be confused with them; especially not obscure ones.
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{{anchor|table-si-photometry-units}} |
{{anchor|table-si-photometry-units}} |
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{| class="wikitable |
{| class="wikitable plainrowheaders" |
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|+ {{navbar-header |1={{resize|130%|{{#if:{{{1|}}}|Table {{{1}}}. }}SI photometry quantities}}|2=SI light units}} |
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|- |
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! colspan="2"| Quantity |
! scope="col" colspan="2" | Quantity |
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! colspan="2"| Unit |
! scope="col" colspan="2" | Unit |
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| ⚫ | !scope="col" rowspan="2" | Dimension<br>{{#tag:ref|The symbols in this column denote [[Dimensional analysis#Definition|dimensions]]; "'''L'''", "'''T'''" and "'''J'''" are for length, time and luminous intensity respectively, not the symbols for the [[Unit of measurement|units]] litre, tesla and joule.|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-dimension-symbol}}<!-- [[http://www.bipm.org/utils/common/pdf/si_brochure_8.pdf]] [[http://www.ptb.de/cms/fileadmin/internet/publikationen/DasInternationaleEinheitensystem.pdf]] --> |
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! [[Dimensional analysis#Definition|Dimension]] |
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! rowspan="2"| Notes |
! scope="col" rowspan="2" | Notes |
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|- |
|- |
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! |
!scope="col" | Name |
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! |
!scope="col" | Symbol{{#tag:ref|[[Standards organization]]s recommend that photometric quantities be denoted with a subscript "v" (for "visual") to avoid confusion with radiometric or [[photon]] quantities. For example: ''USA Standard Letter Symbols for Illuminating Engineering'' USAS Z7.1-1967, Y10.18-1967|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-suffix-v}} |
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! |
!scope="col" | Name |
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! |
!scope="col" | Symbol |
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| ⚫ |
! < |
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|- |
|- |
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| [[Luminous energy]] |
! scope="row" | [[Luminous energy]] |
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| ''Q'' |
| {{math|''Q''{{sub|v}}}}{{#tag:ref|Alternative symbols sometimes seen: {{mvar|W}} for luminous energy, {{mvar|P}}or{{mvar|F}} for luminous flux, and {{mvar|ρ}} for luminous efficacy of a source.|group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}<!-- Luminous energy alternatives: Q is used throughout literature. Palmer recommends W (typo for E?) as acceptable alternative. --> |
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| [[lumen second]] |
| [[lumen second]] |
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| [[lumen (unit)|lm]]⋅s |
| [[lumen (unit)|lm]]⋅s |
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| '''T'''⋅'''J'''<!-- STOP! J does not stand for Joules here! This column is dimensions, not units!--> |
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| '''T'''⋅'''J''' |
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| The lumen second is sometimes called the ''talbot''. |
| The lumen second is sometimes called the ''talbot''. |
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|- |
|- |
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| [[Luminous flux]], luminous power |
! scope="row" | [[Luminous flux]], luminous power |
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| |
| {{math|Φ{{sub|[[Luminosity function|v]]}}}}{{#tag:ref||group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}<!-- Luminous flux alternatives: Phi_v is used throughout the literature, Palmer uses Phi_p as well, but recommends P as acceptable alternative and uses F in HTML docs. P is used in Slovakian WP, F is still partially used in English WP. --> |
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| [[lumen (unit)|lumen]] (= |
| [[lumen (unit)|lumen]] (= candela [[steradian]]) |
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| lm (= |
| lm (= cd⋅sr) |
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| '''J'''<!-- STOP! J does not stand for Joules here! This column is dimensions, not units!--> |
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| '''J''' |
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| Luminous energy per unit time |
| Luminous energy per unit time |
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|- |
|- |
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| [[Luminous intensity]] |
! scope="row" | [[Luminous intensity]] |
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| ''I'' |
| {{math|''I''{{sub|v}}}} |
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| [[candela]] (= |
| [[candela]] (= lumen per steradian) |
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| [[candela|cd]] (= lm/sr) |
| [[candela|cd]] (= lm/sr) |
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| '''J'''<!-- STOP! J does not stand for Joules here! This column is dimensions, not units!--> |
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| '''J''' |
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| Luminous flux per unit [[solid angle]] |
| Luminous flux per unit [[solid angle]] |
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|- |
|- |
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| [[Luminance]] |
! scope="row" | [[Luminance]] |
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| ''L'' |
| {{math|''L''{{sub|v}}}} |
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| [[candela per square metre]] |
| [[candela per square metre]] |
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| cd/m |
| cd/m{{sup|2}} (= lm/(sr⋅m{{sup|2}})) |
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| '''L''' |
| '''L'''{{sup|−2}}⋅'''J''' |
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| Luminous flux per unit solid angle per unit ''projected'' source area. The candela per square metre is sometimes called the ''[[nit (unit)|nit]]''. |
| Luminous flux per unit solid angle per unit ''projected'' source area. The candela per square metre is sometimes called the ''[[nit (unit)|nit]]''. |
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|- |
|- |
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| [[Illuminance]] |
! scope="row" | [[Illuminance]] |
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| ''E'' |
| {{math|''E''{{sub|v}}}} |
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| [[lux]] (= |
| [[lux]] (= lumen per square metre) |
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| [[lux|lx]] (= lm/m |
| [[lux|lx]] (= lm/m{{sup|2}}) |
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| '''L''' |
| '''L'''{{sup|−2}}⋅'''J''' |
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| Luminous flux ''incident'' on a surface |
| Luminous flux ''incident'' on a surface |
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|- |
|- |
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| [[Luminous exitance]], luminous emittance |
! scope="row" | [[Luminous exitance]], luminous emittance |
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| ''M'' |
| {{math|''M''{{sub|v}}}} |
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| lumen per square metre<!-- lux is defined as lm/m2 but not used for luminous exitance --> |
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| lux |
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| lm/m{{sup|2}} |
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| lx |
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| '''L''' |
| '''L'''{{sup|−2}}⋅'''J''' |
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| Luminous flux ''emitted'' from a surface |
| Luminous flux ''emitted'' from a surface |
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|- |
|- |
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| [[Luminous exposure]] |
! scope="row" | [[Luminous exposure]] |
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| ''H'' |
| {{math|''H''{{sub|v}}}} |
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| [[lux second]] |
| [[lux second]] |
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| lx⋅s |
| lx⋅s |
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| '''L''' |
| '''L'''{{sup|−2}}⋅'''T'''⋅'''J''' |
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| Time-integrated illuminance |
| Time-integrated illuminance |
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|- |
|- |
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| Luminous energy density |
! scope="row" | Luminous energy density |
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| ''ω'' |
| {{math|''ω''{{sub|v}}}} |
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| lumen second per cubic metre |
| lumen second per cubic metre |
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| lm⋅s/m |
| lm⋅s/m{{sup|3}} |
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| '''L''' |
| '''L'''{{sup|−3}}⋅'''T'''⋅'''J''' |
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| |
| |
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|- |
|- |
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| [[Luminous efficacy]] |
! scope="row" | [[Luminous efficacy]] (of radiation) |
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| {{math|''K''}} |
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| ⚫ |
| |
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| lumen per [[watt]] |
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| lm/[[watt|W]] |
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| '''M'''{{sup|−1}}⋅'''L'''{{sup|−2}}⋅'''T'''{{sup|3}}⋅'''J''' |
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| Ratio of luminous flux to [[radiant flux]] |
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|- |
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! scope="row" | [[Luminous efficacy]] (of a source) |
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| ⚫ | | {{mvar|η}}{{#tag:ref||group={{#if:{{{3|}}}|{{{3}}}|nb}}|name=note-alternative-symbol-photometric}}<!-- Examples of usage: eta seems to be in general use, rho has been seen in Slovakian WP --> |
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| lumen per [[watt]] |
| lumen per [[watt]] |
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| lm/[[watt|W]] |
| lm/[[watt|W]] |
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| '''M''' |
| '''M'''{{sup|−1}}⋅'''L'''{{sup|−2}}⋅'''T'''{{sup|3}}⋅'''J''' |
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| Ratio of luminous flux to |
| Ratio of luminous flux to power consumption |
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|- |
|- |
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| [[Luminous efficiency]], luminous coefficient |
! scope="row" | [[Luminous efficiency]], luminous coefficient |
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| |
| {{mvar|V}} |
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| Luminous efficacy normalized by the maximum possible efficacy |
| Luminous efficacy normalized by the maximum possible efficacy |
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|- |
|- |
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| style="text-align:center;" colspan= |
| style="text-align:center;" colspan=6 | See also: {{hlist|class=inline|[[SI]]|[[Photometry (optics)|Photometry]]|[[Radiometry]]{{#if:{{{2|}}}|{{!}}([[{{#ifeq:{{{2}}}|self||Radiometry}}#table-si-radiometry-units{{!}}Compare]])}}}} |
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|}{{#if:{{{3|}}}||{{Reflist|group=nb}}}}<noinclude> |
|}{{#if:{{{3|}}}||{{Reflist|group=nb}}}}<noinclude> |
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| Quantity | Unit | Dimension [nb 1] |
Notes | ||
|---|---|---|---|---|---|
| Name | Symbol[nb 2] | Name | Symbol | ||
| Luminous energy | Qv[nb 3] | lumen second | lm⋅s | T⋅J | The lumen second is sometimes called the talbot. |
| Luminous flux, luminous power | Φv[nb 3] | lumen (= candela steradian) | lm (= cd⋅sr) | J | Luminous energy per unit time |
| Luminous intensity | Iv | candela (= lumen per steradian) | cd (= lm/sr) | J | Luminous flux per unit solid angle |
| Luminance | Lv | candela per square metre | cd/m2 (= lm/(sr⋅m2)) | L−2⋅J | Luminous flux per unit solid angle per unit projected source area. The candela per square metre is sometimes called the nit. |
| Illuminance | Ev | lux (= lumen per square metre) | lx (= lm/m2) | L−2⋅J | Luminous flux incident on a surface |
| Luminous exitance, luminous emittance | Mv | lumen per square metre | lm/m2 | L−2⋅J | Luminous flux emitted from a surface |
| Luminous exposure | Hv | lux second | lx⋅s | L−2⋅T⋅J | Time-integrated illuminance |
| Luminous energy density | ωv | lumen second per cubic metre | lm⋅s/m3 | L−3⋅T⋅J | |
| Luminous efficacy (of radiation) | K | lumen per watt | lm/W | M−1⋅L−2⋅T3⋅J | Ratio of luminous flux to radiant flux |
| Luminous efficacy (of a source) | η[nb 3] | lumen per watt | lm/W | M−1⋅L−2⋅T3⋅J | Ratio of luminous flux to power consumption |
| Luminous efficiency, luminous coefficient | V | 1 | Luminous efficacy normalized by the maximum possible efficacy | ||
| See also:
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This template displays a table of SI photometry units for usage in articles about photometry. It may also serve as a navigation box at the end of corresponding articles.
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Some easy examples:
{{SI light units}}
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{{SI light units||compare}}
{{SI light units|1|compare|""}}
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{{SI light units|1|compare|Note}}
{{SI light units|||notes}}
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Combining both tables in a single article (individually grouped footnotes in group "nb"):
{{SI light units|1|self}}
{{SI radiometry units|2|self}}
Combining both tables in a single article (individual footnotes in separately named groups, for example "T1" and "T2"):
{{SI light units|1|self|T1}}
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{{Reflist|group=T2}}
Combining both tables in a single article (combined footnotes, for example in group "nb"):
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{{SI radiometry units|2|self|nb}}
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Combining both tables in a single article (combined footnotes with default references):
{{SI light units|1|self|""}}
{{SI radiometry units|2|self|""}}
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Ideally, the "(Compare)" link would show up to the left or right of the table header, similar to the "v d e" links. Thereby, the cursor would remain in the same position and one could flip back and forth between the two tables without any necessary window realignment. However, this would require a small change in the {{Tnavbar-header}} template.
