►Main optics

We use SOS size (d75mm x t25mm) mirrors for the main optics.

Specifications & Data Sheets

[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]

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 (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

►Miscellaneous Optics

Reflectivity and Transmissivity measurement for various mirrors with 523nm and 1064nm

Mode matching telescope

Name	Type	Size	Incident angle	POL	HR	AR	ROC	Wedge	Substrate	Buy?	Suggested product
MMT1	Mirror	2"x3/8"	2.5?	P	All	YES	-	~1deg	UV fused silica	YES	CVI Y1S-0?
MMT2	Mirror	2"x3/8"	2.5?	P	All	YES	-	~1deg	UV fused silica	YES	CVI Y1S-0?
SM1	Mirror	1.5"x?"	44.5?	P	All	YES	-	~1deg	UV fused silica	YES	CVI Y1S-45?
SM2	Mirror	1.5"x?"	15	P	All	YES	-	~1deg	UV fused silica	YES	CVI Y1S-0?

Specs of the misc mirrors (as of Dec 16, 2009)

Name	Type	Size	Incident angle	POL	HR	AR	ROC	Wedge	Substrate	Buy?	Suggested product
IM1	Mirror	2"x3/8"	45	S	All	YES	-	~1deg	UV fused silica	?
IM2	Mirror	2"x3/8"	25	S	All	YES	-	~1deg	UV fused silica	?
IM3	BS(PO)	1.5"x?"	45	S	1%?	YES	-	~1deg	UV fused silica	?
IM4	Mirror	2"x3/8"	20.5	S	All	YES	-	~1deg	UV fused silica	?
IM5	Mirror	1.5"x?"	23.5	P	All	YES	-	~1deg	UV fused silica	?
IPPO	BS(PO)	1.5"x?"	32.5	P	1%?	YES	-	~1deg	UV fused silica	?

-  ⇤ ← Revision 50 as of 2009-12-17 00:42:15 → 
  Size: 3606
  Editor: KojiArai
  Comment:
+   ← Revision 51 as of 2009-12-17 00:56:04 → ⇥
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  Editor: KojiArai
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 73:
-|| Name || Type || Size || Incident angle || POL || HR || AR || ROC || Wedge || Substrate || Suggested product ||
+|| Name || Type || Size || Incident angle || POL || HR  || AR  || ROC || Wedge || Substrate       || Buy? ||Suggested product ||
|| MMT1  || Mirror || 2"x3/8" || 2.5?     ||  P  || All || YES ||  -  || ~1deg || UV fused silica || YES  || CVI Y1S-0?       ||
|| MMT2  || Mirror || 2"x3/8" || 2.5?     ||  P  || All || YES ||  -  || ~1deg || UV fused silica || YES  || CVI Y1S-0?       ||
|| SM1   || Mirror || 1.5"x?" || 44.5?    ||  P  || All || YES ||  -  || ~1deg || UV fused silica || YES  || CVI Y1S-45?      ||
|| SM2   || Mirror || 1.5"x?" || 15       ||  P  || All || YES ||  -  || ~1deg || UV fused silica || YES  || CVI Y1S-0?       ||
-Line 77:
+Line 80:
-|| Name || Type   || Size    || Incident angle || POL || HR || AR || ROC || Wedge || Substrate || Suggested product ||
|| IM1  || Mirror || 2"x3/8" || 45 || S || All || YES ||  - || ~1deg || UV fused silica || ||
|| IM2  || Mirror || 2"x3/8" || 25 || S || All || YES ||  - || ~1deg || UV fused silica || ||
+|| Name || Type   || Size    || Incident angle || POL || HR  || AR  || ROC || Wedge || Substrate       || Buy? ||Suggested product ||
|| IM1  || Mirror || 2"x3/8" || 45             || S   || All || YES ||  -  || ~1deg || UV fused silica || ?    || ||
|| IM2  || Mirror || 2"x3/8" || 25             || S   || All || YES ||  -  || ~1deg || UV fused silica || ?    || ||
|| IM3  || BS(PO) || 1.5"x?" || 45             || S   || 1%? || YES ||  -  || ~1deg || UV fused silica || ?    || ||
|| IM4  || Mirror || 2"x3/8" || 20.5           || S   || All || YES ||  -  || ~1deg || UV fused silica || ?    || ||
|| IM5  || Mirror || 1.5"x?" || 23.5           || P   || All || YES ||  -  || ~1deg || UV fused silica || ?    || ||
|| IPPO || BS(PO) || 1.5"x?" || 32.5           || P   || 1%? || YES ||  -  || ~1deg || UV fused silica || ?    || ||