►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).

►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_101214.png

attachment:40m_optics_list_upgrade_101214.pdf

attachment:40m_optics_list_upgrade_101214.xls

-  ⇤ ← Revision 47 as of 2009-12-14 13:23:47 → 
  Size: 3094
  Editor: KojiArai
  Comment:
+   ← Revision 61 as of 2011-01-01 04:58:12 → ⇥
  Size: 1348
  Editor: KojiArai
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 1:
+## page was renamed from Upgrade 09/Optics
-Line 2:
+Line 3:
-------
= 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]
-Line 19:
+Line 5:
-== 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 =
+= ►Folding mirrors =
-Line 64:
+Line 10:
-== Specs of the folding mirrors (Temporaly) ==
+== Specs of the folding mirrors (as of Dec 16, 2009) ==
-Line 67:
+Line 13:
-|| 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 ||
-Line 73:
+Line 19:
+'''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).
-Line 75:
+Line 27:
-= Miscellaneous Optics =
+= ►Miscellaneous Optics (as of May 12, 2010) =
-Line 77:
+Line 29:
-[[Upgrade_09/Optics/RTmeasurement|Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm]]
+[[Upgrade 09/Optics/RTmeasurement|Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm]]

[[Optical Layout|Optical Layout]]

attachment:40m_optics_list_upgrade_101214.png

attachment:40m_optics_list_upgrade_101214.pdf

attachment:40m_optics_list_upgrade_101214.xls