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| ## page was renamed from Upgrade 08/Optics == Coatings and Optics == This is a work in progress area for what optic and coatings we need. |
## page was renamed from Upgrade 09/Optics <<TableOfContents(2)>> |
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| || 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 || |
------ = ►Folding mirrors = |
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| [[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]] |
We use 2inch mirrors (d2" x t3/8") mirrors for the PRC/SRC folding mirrors. |
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| ---- . Specs of the folding mirrors for the recycling cavities |
Their name has been changed such that the definition agrees with the AdvLIGO naming. (12/01/2009) |
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| || Name || PR1 || PR2 || SR1 || SR2 || | == 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) == || 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]] |
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| '''Communication between ATF and Coastline''' | |
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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 |
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| Ramin, | |
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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'. | '''R for 532nm to be considered!''' |
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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: | <!> 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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| PRMU01 2° 40' PRMU02 2° 42' PRMU03 2° 43' PRMU04 2° 40' (extra) |
------ |
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| SRMU01 - SRMU02 2° 41' SRMU03 2° 41' SRMU04 2° 44' (extra) }}} |
== 2" Dichroic Recycling Cavity Mirrors from Laseroptik, measurement data of 06-29-2012 == [[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