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<item>
            <title>[REDMINE1D-254] [RM-8175] ABOLUT SENSING - Mesure spectrophotom&#233;trique de LEDs sur LEM</title>
                <link>https://pfspipe.ipmu.jp/jira/browse/REDMINE1D-254</link>
                <project id="11002" key="REDMINE1D">1D Redmine </project>
                    <description>&lt;p&gt;&lt;em&gt;&lt;font color=&quot;#505f79&quot;&gt; Created on 2023-07-07 09:41:39 by Johan Floriot. % Done: 100&lt;/font&gt;&lt;/em&gt;&lt;/p&gt;


&lt;p&gt;En attente de la r&#233;ception des LEM et du mat&#233;riel de pilotage.&lt;br/&gt;
Mesure photom&#233;trique par sph&#232;re int&#233;grante&lt;br/&gt;
Mesure spectro avec spectro &#224; TF fibr&#233; Thorlabs&lt;/p&gt;</description>
                <environment></environment>
        <key id="23681">REDMINE1D-254</key>
            <summary>[RM-8175] ABOLUT SENSING - Mesure spectrophotom&#233;trique de LEDs sur LEM</summary>
                <type id="3" iconUrl="https://pfspipe.ipmu.jp/jira/secure/viewavatar?size=xsmall&amp;avatarId=10518&amp;avatarType=issuetype">Task</type>
                                            <priority id="10000" iconUrl="https://pfspipe.ipmu.jp/jira/images/icons/priorities/medium.svg">Normal</priority>
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                                        <assignee username="r2j.migrate">Redmine-Jira Migtation</assignee>
                                    <reporter username="r2j.migrate">Redmine-Jira Migtation</reporter>
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                <created>Fri, 7 Jul 2023 16:58:21 +0000</created>
                <updated>Mon, 22 Jan 2024 18:24:42 +0000</updated>
                            <resolved>Mon, 22 Jan 2024 18:24:42 +0000</resolved>
                                                                        <due></due>
                            <votes>0</votes>
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                                                                <comments>
                            <comment id="36741" author="r2j.migrate" created="Mon, 22 Jan 2024 18:22:51 +0000"  >&lt;p&gt;Comment by Johan Floriot on 2023-09-07 09:30:22:&lt;br/&gt;
Premi&#232;re mesures de principe faites:&lt;/p&gt;
&lt;ul&gt;
	&lt;li&gt;photodiode (silicium) de la sph&#232;re int&#233;grante non sensible dans le NIR; la mesure du flux int&#233;gr&#233; est probl&#233;matique&lt;/li&gt;
	&lt;li&gt;mesure de spectre par le Thorlabs FTS: d&#233;mo faite; du bruit de mesure&lt;/li&gt;
	&lt;li&gt;probl&#232;mes du PID de r&#233;gulation thermique.&lt;/li&gt;
&lt;/ul&gt;
</comment>
                            <comment id="36742" author="r2j.migrate" created="Mon, 22 Jan 2024 18:23:03 +0000"  >&lt;p&gt;Comment by Johan Floriot on 2024-01-22 10:07:52:&lt;br/&gt;
Mesures termin&#233;es apr&#232;s moult p&#233;rip&#233;ties:&lt;/p&gt;
&lt;ul class=&quot;alternate&quot; type=&quot;square&quot;&gt;
	&lt;li&gt;on a fait 3 fois les mesures car mauvaise dissipation thermique dans la le support de LEM.&lt;/li&gt;
	&lt;li&gt;discussion sans fin autour du bruit de mesure du spectro Thorlabs. Nous avons prouv&#233; que le bruit &#233;tait blanc et que le SNR &#233;tait tr&#232;s correct m&#234;me quand il y a peu de signal.&lt;/li&gt;
	&lt;li&gt;les bandes 500-600nm et 1600-1750nm posent probl&#232;mes car le spectro n&apos;est pas calibr&#233; (zone spectrale &#233;tendue sur demande LAM). Voir point pr&#233;c&#233;dent.&lt;/li&gt;
	&lt;li&gt;les diodes centr&#233;es vers 1600nm posent probl&#232;mes (spectres coup&#233;s) mais cela &#233;tait pr&#233;visible en amont.&lt;/li&gt;
&lt;/ul&gt;
</comment>
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                            <attachment id="17047" name="Devis prestation_ABSOLUT_SENSING.pdf" size="782194" author="r2j.migrate" created="Mon, 22 Jan 2024 18:23:27 +0000"/>
                            <attachment id="17046" name="Devis prestation_ABSOLUT_SENSING.xlsx" size="25650" author="r2j.migrate" created="Mon, 22 Jan 2024 18:23:12 +0000"/>
                            <attachment id="17048" name="PO-202305-015.pdf" size="156047" author="r2j.migrate" created="Mon, 22 Jan 2024 18:23:40 +0000"/>
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                            <attachment id="17052" name="Quelques &#233;l&#233;ments sur le bruit de mesure_20240115.pptx" size="591444" author="r2j.migrate" created="Mon, 22 Jan 2024 18:24:36 +0000"/>
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