<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 12pt; color: #000000"><div>Hello Tyler,</div><div><br data-mce-bogus="1"></div><div>Reflectance for light with length more than 300 nm has to be near 85-90% (see the attached example). As I can understand from your spreadsheet the column A corresponds to the reference photodiode. It means that all three columns (B,F and G) have to be very close to each other.</div><div>However the Calibration B is different from F and G. It means probably that something happened with the light alignment. It is the reason that your are getting 100% reflectance.</div><div><br data-mce-bogus="1"></div><div>Regards,</div><div>Valery</div><div><br data-mce-bogus="1"></div><div><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><b>From: </b>"Tyler Lemon" <tlemon@jlab.org><br><b>To: </b>"dsg-rich" <dsg-rich@jlab.org><br><b>Sent: </b>Thursday, July 13, 2017 11:52:54 AM<br><b>Subject: </b>[Dsg-rich] RICH mirror reflectivity procedure and Mirror 3 samples 21 and 22 results<br></blockquote></div><div data-marker="__QUOTED_TEXT__"><blockquote style="border-left:2px solid #1010FF;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;" data-mce-style="border-left: 2px solid #1010FF; margin-left: 5px; padding-left: 5px; color: #000; font-weight: normal; font-style: normal; text-decoration: none; font-family: Helvetica,Arial,sans-serif; font-size: 12pt;"><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><div>Hello,<br></div></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;">We have completed the reflectivity tests for Mirror 3, samples 21 and 22. Attached are the Excel files of the results.<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><br><div>The following is the procedure we followed:<br></div><br><div>1.) Arrange photodiodes for calibration run.<br></div><div>2.) Run calibration. Calibration scans wavelengths from 300 nm- 650 nm at 10 nm steps.<br></div><br><div>3.) Arrange photodiodes and mirror sample 22 for test runs.<br></div><div>4.) Run test #1. Test also scans wavelengths from 300 nm- 650 nm at 10 nm steps.<br></div><div>5.) Repeat test scan (Test #2).<br></div></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><br></div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;">6.) Replace sample 22 with sample 21.</div><div style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000" data-mce-style="font-family: times new roman,new york,times,serif; font-size: 12pt; color: #000000;"><div>7.) Run test #1. Test scans wavelengths from 300 nm- 650 nm at 10 nm steps.<br></div><div>8.) Repeat test scan (Test #2).</div><br><div>Best regards,<br></div><div>Tyler</div></div></div></div><br></div></div><br>_______________________________________________<br>Dsg-rich mailing list<br>Dsg-rich@jlab.org<br>https://mailman.jlab.org/mailman/listinfo/dsg-rich<br></blockquote></div></div></body></html>