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| == 6.5" Window Specs for Optical Enclosure, March 2013 == | == 6.5" Window Specs for Optical Table Enclosure, March 2013 == [[ ARGE WINDOW SPECS FOR OPTICAL TABLE COVER 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", thickness 1" + - 0.02" 3, wedge 2 degrees 4, bevel both sides ~ 0.04" 5, surface quality 10-5 6, flatness 1/4 wave 7, 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 ]] |
Contents
►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!
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
►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, March 2013
- [[ ARGE WINDOW SPECS FOR OPTICAL TABLE COVER 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", thickness 1" + - 0.02" 3, wedge 2 degrees 4, bevel both sides ~ 0.04" 5, surface quality 10-5 6, flatness 1/4 wave 7, 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 ]]