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IEC 60050 - International Electrotechnical Vocabulary - Details for IEV number 845-24-072: "transmittance optical density"
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Equivalent terms for transmittance optical density." /> <meta name="Keywords" content="transmittance optical density, optical density, transmittance density, decadic absorbance,densité optique par transmission, f, densité optique, f, densité optique par transmission, f, facteur d'absorption décadique, m,كثافة ضوئية نافذة, كثافة ضوئية, كثافة نفاذية,optische Dichte bei Transmission, f,densità ottica di trasmittanza, densità ottica,透過濃度, 透過光学濃度,gęstość optyczna współczynnika przepuszczania, f,densidade óptica por transmissão,optická hustota činitele prostupu, optická hustota, hustota činitele prostupu, dekadická absorbance,투과율 광밀도,optische dichtheid van de transmissiecoëfficiënt,optische dichtheid door transmissie, f,透射光密度, 透射光学密度, 光密度, dictionary, definition, meaning, translation, term, terminology, IEC 60050, Electropedia, IEV 845-24-072,IEV, International, Electrotechnical, Vocabulary, VEI, Vocabulaire, Electrotechnique, Internationale, IEC, electric, electronic" /> <meta name="Copyright" content="IEC - International Electrotechnical Commission" /> <meta name="Language" content="English, French, Arabic, Chinese, Czech, Finnish, German, Italian, Japanese, Norwegian, Polish, Portuguese, Russian, Serbian, Slovenian, Spanish, Swedish" /> <SCRIPT language="JavaScript"> function printWindow() { bV = parseInt(navigator.appVersion); 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Please </font><a href="https://www.iec.ch/contact"><font size="2" face="Arial">contact us</font></a><font size="2" face="Arial">.</font></div></td></tr> </table> <br /> <input type="button" value=" Home " class="hide" style="font-size: 11px;" onclick="window.open('/iev/iev.nsf/6d6bdd8667c378f7c12581fa003d80e7?OpenForm', document._domino_target);" /> <input type="button" onclick="history.back()" value=" Back " class="hide" style="font-size: 11px;" /> <input type="button" onclick="printWindow()" value=" Print " class="hide" style="font-size: 11px;" /><style> td.col1 {width:57px;} td.col11 {width:55px;} td.col2 {width:21px;} td.col21 {width:19px;width:25px; text-align:left;} td.col3 {width:567px;} td.col4 {width:57px;} table.table1 {width:710px;} </style> <font face=""><br> <br /> <table class ="table1" cellpadding="1" cellspacing="0" border="0" cellpadding="0"> <tr valign="top"> <td class="col1"><b><font size="2" color="#800080" face="Arial">Area</font></b></td> <td class="col2"><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td class="col3"><b><font size="2" face="Arial"></font></b><a href=index?openform&part=845>Lighting</a> / Emission, optical properties of materials </td> <td class="col4"><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><b><font size="2" color="#800080" face="Arial">IEV ref</font></b></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td><b><b>845-24-072</b></b></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">Symbol</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td><i>D<sub>τ</sub></i> </td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">en</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td><b>transmittance optical density</b><br>optical density<br>transmittance density<br>decadic absorbance</td> </tr> <tr valign="top"> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> logarithm to base 10 of the reciprocal of the transmittance, <i>τ</i><p><i>D<sub>τ</sub></i> = −log<sub>10</sub><i>τ</i><p>Note 1 to entry: The transmittance optical density has unit one.<p>Note 2 to entry: This entry was numbered 845-04-66 in IEC 60050-845:1987. </td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">fr</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> <b>densité optique par transmission</b>, f<br>densité optique, f<br>densité optique par transmission, f<br>facteur d'absorption décadique, m</td> </tr> <tr valign="top"> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> logarithme décimal de l'inverse du facteur de transmission, <i>τ</i><p><i>D<sub>τ</sub></i> = −log<sub>10</sub><i>τ</i><p>Note 1 à l'article: L'unité de densité optique par transmission est un.<p>Note 2 à l'article: Cet article était numéroté 845-04-66 dans l'IEC 60050-845:1987. </td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">ar</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td style="direction:rtl; text-align:right;padding-right: 30px" width="567"> كثافة ضوئية نافذة<br>كثافة ضوئية<br>كثافة نفاذية</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">cs</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> optická hustota činitele prostupu<br>optická hustota<br>hustota činitele prostupu<br>dekadická absorbance</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">de</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> optische Dichte bei Transmission, f</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">it</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> densità ottica di trasmittanza<br>densità ottica</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080" face="Arial">ko</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> 투과율 광밀도</td> </tr> <tr valign="top"> <td width="701" colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080">ja</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td lang="ja-jp"> 透過濃度<br>透過光学濃度</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td colspan="4"> <table cellpadding="0" cellspacing="0" border="0" cellpadding="0" style="width:100%"> <tr> <td class="col11"><div align="center"><font color="#800080">nl </font></div></td> <td class="col21"><font color="#800080">nl</font></td> <td>optische dichtheid van de transmissiecoëfficiënt</td> </tr> <tr> <td></td> <td colspan="3"><hr></td> </tr> <tr> <td class="col11"><div align="center" style="display:none"><font color="#800080">nl</font></div></td> <td class="col21"><font color="#800080">be</font></td> <td>optische dichtheid door transmissie, f</td> </tr> </table> </td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080" face="Arial">pl</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> gęstość optyczna współczynnika przepuszczania, f</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080" face="Arial">pt</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> densidade óptica por transmissão</td> </tr> <tr valign="top"> <td colspan="4"><hr></td> </tr> <tr valign="top"> <td><div align="center"><font color="#800080" face="Arial">zh</font></div></td> <td><img width="1" height="1" src="/icons/ecblank.gif" border="0" alt="" /></td> <td> 透射光密度<br>透射光学密度<br>光密度</td> </tr> </table> </font><hr> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr valign="top"><td width="25%"><a href="/iev/iev.nsf/display?openform&ievref=845-24-072&login"></a><font color="#800080">Publication date:</font> 2020-12 </td><td width="75%"><div align="right"><a href="http://www.iec.ch/about/copyright/copyright-db_entry.htm" target="_blank"><font color="#003399">Copyright</font></a> © <a href="https://www.iec.ch/about-us" target="_blank"><font color="#003399">IEC</font></a> 2025. 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