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| TBD | See [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=1231|JGW-T1201231, Effect due to viewports for optical lever (in Japanese)]] |
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| == Links == | == External Links == |
Viewports (at Room Temperature)
Related subgroups: MIR, IOO, MIF, VAC, CRY, VIS...
Contents
Scope
This subsystem provides the optical viewports mounted on the vacuum chambers to pass the optical beams into or from the LCGT in-vacuum interferometer. The optical beams include...
Cryo-vacuum viewports are NOT included in the scope of this subsystem so far.
Applicable Documents
- Spec. for vacuum chambers
- Optical Layout Drawing of the LCGT interferometer
- Length Sensing and Control doc
- Alignment Sensing and Control doc
- Optical lever doc
- CCD Monitor doc
- Any...
General Description
At the viewports, we can extract optical beams from the interferometer placed inside the vacuum chambers. The optical beams would be utilized for length and alignment sensing and control scheme, optical levers for suspensions, and other monitoring devices (CCD or equivalent video cameras).
For example, the viewport would be equipped with
- AR coating for 1064 nm and 532 nm
- Wedge angle
Details are described in Characteristics section.
Functions
Beams for
- Transmission of IR/Green lasers
- Optical Lever transmitter/receiver
- Video camera
- Illumination
- Diagnostic
- (Squeeze)
- (Spare)
Naming Conventions
TBD
Locations
Here, the number of viewports required by each subsystem at each vacuum chamber is listed.
Chamber Name |
Type |
Quantity |
Purpose |
Used By |
PRM |
1064nm AR |
1 |
REFL port |
ISC |
PRM |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
PRM |
Visible |
1 |
CCD |
Everyone |
PR2 |
1064nm&532 dichroic AR |
1 or 2 |
POP/Green |
ISC |
PR2 |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
PR2 |
Visible |
1 |
CCD |
Everyone |
PR3 |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
PR3 |
Visible |
1 |
CCD |
Everyone |
BS |
1064nm AR |
1 |
POX/POY beams |
ISC |
BS |
OpLev wavelength |
2 |
Optical Lever |
AOS/SUS |
BS |
Visible |
1 |
CCD |
Everyone |
ITMX |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
ITMX |
Visible |
1 |
CCD |
Everyone |
ITMY |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
ITMY |
Visible |
1 |
CCD |
Everyone |
ETMX |
1064nm&532 dichroic AR |
1 |
Transmission |
ISC |
ETMX |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
ETMX |
Visible |
1 |
CCD |
Everyone |
ETMY |
1064nm&532 dichroic AR |
1 |
Transmission |
ISC |
ETMY |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
ETMY |
Visible |
1 |
CCD |
Everyone |
SRM |
1064nm AR |
1 |
AS port |
ISC |
SRM |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
SRM |
Visible |
1 |
CCD |
Everyone |
SR2 |
1064nm&532 dichroic AR |
1 or 2 |
POS/Green |
ISC |
SR2 |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
SR2 |
Visible |
1 |
CCD |
Everyone |
SR3 |
OpLev wavelength |
2 |
OpLev |
AOS/SUS |
SR3 |
Visible |
1 |
CCD |
Everyone |
Requirements
TBD
Characteristics
TBD
Inspection plans
See JGW-T1201231, Effect due to viewports for optical lever (in Japanese)
Procurement process and plans
TBD