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| ------ = Main optics = We use SOS size (d75mm x t25mm) mirrors for the main optics. == Specifications & Data Sheets == <<ImageLink(091111_optics_spec_t.png, Upgrade_09/Optics/Spec_Summary)>> [attachment:091111_optics_spec.pdf PDF] 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] |
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| == Substrate Material == The material of the substrate is Corning 7980 Fused Silica, grade UV-0A. |
= ►Folding mirrors = |
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| [http://www.corning.com/docs/specialtymaterials/pisheets/H0607_hpfs_Standard_ProductSheet.pdf Link to the data sheet of Corning 7980] | |
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| == 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 = |
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| == Specs of the folding mirrors (Temporaly) == | == New PR3/SR3 mirrors (delivered Feb 7th, 2029) == Design Specification [[https://dcc.ligo.org/LIGO-E1800089 | E1800089]] Specification of the delivered optics Substrate Spec: [[attachment:AdvancedGlassIndustries.pdf]] Polish Spec: [[attachment:CoastlineOptics.pdf]] Coating Spec: [[attachment:FiveNineOptics.pdf]] == Specs of the folding mirrors (as of Dec 16, 2009) == |
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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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'''R for 532nm to be considered!''' <!> At the installation in 2010, G&H HR mirrors were used for the TT mirrors. This results very little transmission through those mirrorrs (<25ppm). |
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| = Miscellaneous Optics = | == 2" Dichroic Recycling Cavity Mirrors from Laseroptik, measurement data of 06-29-2012 == |
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| [[Upgrade 09/Optics/RT measurement|Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm]] | [[attachment:26062ke2_HT532nms+p_HR1064nmp39-48°.pdf]] [[attachment:25062ke1_AR532nms+p+1064nmp39-48°.pdf]] [[attachment:25062ke1_AR532nms+p+1064nmp39-48°.pdf]] [[attachment:B-09458.pdf]] [[attachment:B-09465.pdf]] --------- == Gooch & Housego 2" & 1" mirrors 03/15/2010 == [[attachment:G&H_2"_1064HR_0-45dinc.pdf]] [[attachment:photo 1.JPG]] [[attachment:photo 2.JPG]] ---------- == CVI 2" Stock Beamsplitters == [[attachment:BS1-1064-95-2025-45UNP.png]] Note: Red is S-Pol., Blue is P-Pol. ---------- = ►Miscellaneous Optics (as of May 12, 2010) = [[Upgrade_09/Optics/RTmeasurement|Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm]] [[Optical_Layout]] {{attachment:40m_optics_list_upgrade_101214.png}} [[attachment:40m_optics_list_upgrade_101214.pdf]] [[attachment:40m_optics_list_upgrade_101214.xls]] ------------- == 6.5" Window Specs for Optical Table Enclosure and Vacuum, March 2013 == WINDOW SPECS FOR OPTICAL TABLE ENCLOUSER and VACUUM VIEW PORT AT 40M We changed some details, look carefully. Please quote us as shown below for 4 pieces of large windows and 5 pieces of 1" diameter mirrors Window specs I. Fabricate 1. material BK-7, grade A 2. diameter 6.5" + - 0.02", 3. thickness 1" + - 0.02", 4. wedge 2 degrees 5. bevel both sides ~ 0.04" 6. surface quality 10-5 7. flatness 1/4 wave 8. meet specs on central 5.5" II. AR Coating 1. R < 0.2% at 532 and 1064 nm 2. incident angles 0-10 degrees on both sides 3. over the central 5" diameter 4. coat witness plates as shown below III, Verify 1. verify the specs via measurement before shipping 2. identify coating processes IV, small mirrors (witness plates for 6.5" window coating run) 5 pieces 1. material BK-7, grade A 2. diameter 1", 0.25" thick minimum 3. wedge 1 degree 4. surface quality 10-5 5. coat one side only 6. use same coating run as 6.5" windows [[ Laseroptics insisted using FUSED SILICA on these quotes ]] [[attachment:Laseroptic_Quote_6.5"_Windows.pdf]] [[attachment:Laseroptic_Quote_6.5"_Windows_spectrum.pdf]] [[attachment:6.5"_Cascade_Quote_#2.pdf]] |
►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)
New PR3/SR3 mirrors (delivered Feb 7th, 2029)
Design Specification E1800089
Specification of the delivered optics
Substrate Spec: AdvancedGlassIndustries.pdf
Polish Spec: CoastlineOptics.pdf
Coating Spec: FiveNineOptics.pdf
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!
At the installation in 2010, G&H HR mirrors were used for the TT mirrors. This results very little transmission through those mirrorrs (<25ppm).
2" Dichroic Recycling Cavity Mirrors from Laseroptik, measurement data of 06-29-2012
26062ke2_HT532nms+p_HR1064nmp39-48°.pdf
25062ke1_AR532nms+p+1064nmp39-48°.pdf
Gooch & Housego 2" & 1" mirrors 03/15/2010
CVI 2" Stock Beamsplitters
BS1-1064-95-2025-45UNP.png Note: Red is S-Pol., Blue is P-Pol.
►Miscellaneous Optics (as of May 12, 2010)
Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm
40m_optics_list_upgrade_101214.pdf
40m_optics_list_upgrade_101214.xls
6.5" Window Specs for Optical Table Enclosure and Vacuum, March 2013
- WINDOW SPECS FOR OPTICAL TABLE ENCLOUSER and VACUUM VIEW PORT AT 40M
We changed some details, look carefully. Please quote us as shown below for 4 pieces of large windows and 5 pieces of 1" diameter mirrors
Window specs
I. Fabricate
- material BK-7, grade A
- diameter 6.5" + - 0.02",
- thickness 1" + - 0.02",
- wedge 2 degrees
- bevel both sides ~ 0.04"
- surface quality 10-5
- flatness 1/4 wave
- meet specs on central 5.5"
II. AR Coating
R < 0.2% at 532 and 1064 nm
- incident angles 0-10 degrees on both sides
- over the central 5" diameter
- coat witness plates as shown below
III, Verify
- verify the specs via measurement before shipping
- identify coating processes
IV, small mirrors (witness plates for 6.5" window coating run) 5 pieces
- material BK-7, grade A
- diameter 1", 0.25" thick minimum
- wedge 1 degree
- surface quality 10-5
- coat one side only
- use same coating run as 6.5" windows