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	<id>https://www.iala.int/wiki/dictionary/index.php?action=history&amp;feed=atom&amp;title=Transmittance</id>
	<title>Transmittance - Revision history</title>
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	<updated>2026-10-31T06:05:50Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.41.5</generator>
	<entry>
		<id>https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=13205&amp;oldid=prev</id>
		<title>Minsuids: Dictionary clean-up: identifier → urn:mrn:iala:dic:2-1-0185</title>
		<link rel="alternate" type="text/html" href="https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=13205&amp;oldid=prev"/>
		<updated>2026-09-17T10:09:59Z</updated>

		<summary type="html">&lt;p&gt;Dictionary clean-up: identifier → urn:mrn:iala:dic:2-1-0185&lt;/p&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 10:09, 17 September 2026&lt;/td&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;2-1-&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;185&lt;/del&gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;urn:mrn:iala:dic:&lt;/ins&gt;2-1-&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;0185&#039;&#039;&#039;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Alternative term: Transmission Factor&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Alternative term: Transmission Factor&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Minsuids</name></author>
	</entry>
	<entry>
		<id>https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=6605&amp;oldid=prev</id>
		<title>Oferiks: 1 revision</title>
		<link rel="alternate" type="text/html" href="https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=6605&amp;oldid=prev"/>
		<updated>2009-03-01T10:01:03Z</updated>

		<summary type="html">&lt;p&gt;1 revision&lt;/p&gt;
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 10:01, 1 March 2009&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
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		<author><name>Oferiks</name></author>
	</entry>
	<entry>
		<id>https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=6604&amp;oldid=prev</id>
		<title>Oferiks: 1 revision</title>
		<link rel="alternate" type="text/html" href="https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=6604&amp;oldid=prev"/>
		<updated>2009-02-25T10:00:06Z</updated>

		<summary type="html">&lt;p&gt;1 revision&lt;/p&gt;
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 10:00, 25 February 2009&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
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		<author><name>Oferiks</name></author>
	</entry>
	<entry>
		<id>https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=1484&amp;oldid=prev</id>
		<title>Oferiks: 1 revision</title>
		<link rel="alternate" type="text/html" href="https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=1484&amp;oldid=prev"/>
		<updated>2009-02-25T00:00:06Z</updated>

		<summary type="html">&lt;p&gt;1 revision&lt;/p&gt;
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				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 00:00, 25 February 2009&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Oferiks</name></author>
	</entry>
	<entry>
		<id>https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=1483&amp;oldid=prev</id>
		<title>Oferiks at 12:00, 15 February 2009</title>
		<link rel="alternate" type="text/html" href="https://www.iala.int/wiki/dictionary/index.php?title=Transmittance&amp;diff=1483&amp;oldid=prev"/>
		<updated>2009-02-15T12:00:00Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&lt;br /&gt;
&amp;#039;&amp;#039;&amp;#039;2-1-185&lt;br /&gt;
&lt;br /&gt;
Alternative term: Transmission Factor&lt;br /&gt;
&lt;br /&gt;
The ratio of the transmitted luminous flux (Ft) to the incident flux (Fo).&lt;br /&gt;
&lt;br /&gt;
Symbol: T&lt;br /&gt;
&lt;br /&gt;
Note: Where mixed transmission occurs, the (total) transmittance may be divided into two parts, Regular Transmittance (T r) and Diffuse Transmittance (Td),corresponding respectively to the  two  modes of  transmission  referred to in  2-1-170  and  2-1-175.&lt;br /&gt;
&lt;br /&gt;
T = T r+ Td&lt;br /&gt;
&lt;br /&gt;
Reference: C.I.E. (modified)&lt;br /&gt;
&lt;br /&gt;
{{IALAFooter}}&lt;br /&gt;
&lt;br /&gt;
{{languages|Transmittance}}&lt;br /&gt;
[[Category:2.1 Optics and Vision]]&lt;br /&gt;
[[Category:Alphabetical Index]]&lt;br /&gt;
[[Category:IALA Dictionary 1970-89 Edition]]&lt;/div&gt;</summary>
		<author><name>Oferiks</name></author>
	</entry>
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