►Folding mirrors

We use 2inch mirrors (d2" x t3/8") mirrors for the PRC/SRC folding mirrors.

Their name has been changed such that the definition agrees with the AdvLIGO naming. (12/01/2009)

Specs of the folding mirrors (as of Dec 16, 2009)

Name	PR2	PR3	SR3	SR2
Size	2"dia. X 3/8" thick	2"dia. X 3/8" thick	2"dia. X 3/8" thick	2"dia. X 3/8" thick
Incident angle	2.5 deg	36.5 deg	44 deg	6 deg
HR Transmission 1064 nm	500ppm	< 100 ppm	< 100ppm	< 100ppm
AR Reflection 1064 nm	< 0.25%	< 0.25%	< 0.25%	< 0.25%
ROC	Flat	Flat	Flat	Flat
Wedge angle	1 deg	1 deg	1 deg	1 deg
Qty.	2	2	2	2

R for 532nm to be considered!

►Miscellaneous Optics (as of May 12, 2010)

Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm

Optical Layout

attachment:40m_optics_list_upgrade_100512.png

attachment:40m_optics_list_upgrade_100512.pdf

attachment:40m_optics_list_upgrade_100512.xls

-  ⇤ ← Revision 36 as of 2009-11-21 06:57:36 → 
  Size: 2992
  Editor: KojiArai
  Comment:
+   ← Revision 58 as of 2011-01-01 04:49:16 → ⇥
  Size: 1208
  Editor: KojiArai
  Comment:
-Deletions are marked like this.
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-## page was renamed from Upgrade 08/Optics
+## page was renamed from Upgrade 09/Optics
<<TableOfContents(2)>>
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-== Substrate Material ==
+------
= ►Folding mirrors =
We use 2inch mirrors (d2" x t3/8") mirrors for the PRC/SRC folding mirrors.
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-The material of the substrate is Corning 7980 Fused Silica, grade UV-0A.
+Their name has been changed such that the definition agrees with the AdvLIGO naming. (12/01/2009)
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-[http://www.corning.com/docs/specialtymaterials/pisheets/H0607_hpfs_Standard_ProductSheet.pdf Here]
is the link to the data sheet of Corning 7980.

== Coatings and Optics ==
This is a work in progress area for what optic and coatings we need.

|| Parameter || ITMs || ETMs || PRM || SRM || FM (4x) ||
|| HR Transmission 1064 nm || 0.014 * || 10 ppm ||0.055 +/-0.003 ||0.10 +/- 0.005 || <0.01 ||
|| HR Transmission 532 nm || < 1000 ppm || 0.10 ||n/a ||n/a ||n.r. ||
|| AR Reflection 1064 nm || < 1000 ppm || < 100 ppm ||< 300 ppm ||< 300 ppm || <0.01 ||
|| AR Reflection 532 nm || <0.01 || < 1000 ppm ||n/a ||n/a || ||
|| ROC || Flat (>5 km) || 57.5 m? ||115.5 96.3 +50/-0 (96**) || 142 117.1+50/-20 (116.3**) || inf ||
|| Wedge angle || 1 deg (+/- 0.2 deg) || 1 deg ||1 deg ||1 deg ||1 deg ||


[[BR]][[BR]]*''T_ITMnom = 0.014 +/- 0.002. All 3 ITMs in the same coating run to match the T, i.e. T_ITMY - T_ITMX < 0.0003. Tolerance in T_ITMnom is larger.''** Based on ETM and ITM ROC, assuming inf. thin optics.
----
 . Draft zip file of specs in .doc format: attachment:40mCOC-080723.zip (need to change the ext to .doc)      
 . Also in [attachment:40mCOC-080723.pdf PDF]      

----
 . Specs of the folding mirrors for the recycling cavities         

|| Name || PR1 || PR2 || SR1 || SR2 ||
+== Specs of the folding mirrors (as of Dec 16, 2009) ==
|| Name || PR2 || PR3 || SR3 || SR2 ||
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-|| Incident angle || 2.5 deg || 36.5 deg || 39.9 deg || 17.1 deg ||
+|| Incident angle || 2.5 deg || 36.5 deg || 44 deg || 6 deg ||
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- . [[Upgrade 08/Optics/RCParams|Considerations on the parameters of PRC/SRC]]
+'''R for 532nm to be considered!'''
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-----
+------
= ►Miscellaneous Optics (as of May 12, 2010) =
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-'''Communication between ATF and Coastline'''
+[[Upgrade 09/Optics/RTmeasurement|Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm]]
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-{{{
From: Gene Lapp
Sent: Tuesday, July 28, 2009 4:00 PM
To: Ramin Lalezari Cc: Vern Korn; John Tardif (E-mail)
Subject: Power Recycling Mirrors / Signal Recycling Mirrors
+[[Upgrade 09/Optical Layout|Optical Layout]]
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-Ramin,
+attachment:40m_optics_list_upgrade_100512.png
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-I've run across another small problem with the Power Recycling & Signal Recycling Mirrors.  The wedge angle is called out as 2° 30' ± 5'.  The parts are measuring between 2° 40' and 2° 44' (all ± 0.5').  We have traced this problem to an error in our wedge tool, which is nominally at 2° 40'.
+attachment:40m_optics_list_upgrade_100512.pdf
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-All the mirrors have been measured except for one Signal Recycling Mirror (currently on the polishing machine).  I expect that it will be in the same condition.  The measurements are as follows:

PRMU01    2° 40'
PRMU02    2° 42'
PRMU03    2° 43'
PRMU04    2° 40'  (extra)

SRMU01    -
SRMU02    2° 41'
SRMU03    2° 41'
SRMU04    2° 44'  (extra)
}}}

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Data sheets from ATF on 40m svn
[https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/Data_Sheet_sent_by_ATF/]
+attachment:40m_optics_list_upgrade_100512.xls