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| == Coatings and Optics == This is a work in progress area for what optic and coatings we need. |
<<TableOfContents(2)>> |
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| || Parameter || ITMs || ETMs || PRM || SRM || FM (4x) || || HR Transmission 1064 nm || 0.014|| 10 ppm || || || <0.01 || || HR Transmission 532 nm || < 1000 ppm|| 0.10 || || || || || AR Reflection 1064 nm || 1000 ppm|| < 100 ppm || || || <0.01 || || AR Reflection 532 nm || <0.01|| < 1000 ppm || || || || || ROC || inf|| 40 m? || || || inf|| || Wedge angle || 1 deg || 1 deg || || || || |
------ = Main optics = We use SOS size (d75mm x t25mm) mirrors for the main optics. == Specifications & Data Sheets == Specifications for 40m upgrade [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/LatestPDFs 40mSVN] COC documents/drawing files [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/ 40mSVN] Data sheets from ATF [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/Data_Sheet_sent_by_ATF/ 40mSVN] ------ == Substrate Material == The material of the substrate is Corning 7980 Fused Silica, grade UV-0A. [http://www.corning.com/docs/specialtymaterials/pisheets/H0607_hpfs_Standard_ProductSheet.pdf Link to the data sheet of Corning 7980] == Radius of Curvatures == [[Upgrade 08/Optics/RCParams|Considerations on the parameters of PRC/SRC]] == Discrepancies between the spec and the delivered optics == * We are going to use one of the SRMs as a temporaly PRM. * PRMs and SRMs will have the wedge angle larger than the spec (see below). PRMs were returned for repolish. Thus, their wedge angles might be vary. This is to be confirmed. * ITMs have the wedge angle of ~1deg, instead of the spec "2 deg" '''Communication between ATF and Coastline''' {{{ 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 Ramin, 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'. 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) }}} ------ = 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 (Temporaly) == || 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 || 39.9 deg || 17.1 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 || |
Contents
Main optics
We use SOS size (d75mm x t25mm) mirrors for the main optics.
Specifications & Data Sheets
Specifications for 40m upgrade [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/LatestPDFs 40mSVN]
COC documents/drawing files [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/ 40mSVN]
Data sheets from ATF [https://nodus.ligo.caltech.edu:30889/svn/trunk/docs/upgrade08/cocdocs/Data_Sheet_sent_by_ATF/ 40mSVN]
Substrate Material
The material of the substrate is Corning 7980 Fused Silica, grade UV-0A.
[http://www.corning.com/docs/specialtymaterials/pisheets/H0607_hpfs_Standard_ProductSheet.pdf Link to the data sheet of Corning 7980]
Radius of Curvatures
Considerations on the parameters of PRC/SRC
Discrepancies between the spec and the delivered optics
- We are going to use one of the SRMs as a temporaly PRM.
- PRMs and SRMs will have the wedge angle larger than the spec (see below).
PRMs were returned for repolish. Thus, their wedge angles might be vary. This is to be confirmed.
- ITMs have the wedge angle of ~1deg, instead of the spec "2 deg"
Communication between ATF and Coastline
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 Ramin, 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'. 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)
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 (Temporaly)
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 |
39.9 deg |
17.1 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 |