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adLIGO R&D 1LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Two SOS optics were used to represent the Reaction Mass and either the ITM or ETM masses. Optics had 3 degrees of freedom.
adLIGO R&D 2LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Keyence CCD displacement measuring heads. Heads come with a target range and a ± working tolerance.
Laser output port.
CCD Camera
adLIGO R&D 3LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
The heads propagate a 635nm beam to each of the 4 optic surfaces that reflect back to the CCD camera measuring the displacement.
adLIGO R&D 4LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
The output values and settings can be set on the controller locally or on a laptop.
adLIGO R&D 5LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Laptop settings
adLIGO R&D 6LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Laptop grid screen showing the gap and optic thicknesses realtime.
GAP measurement shown is the value between the white cursors. Scale was set for 4mm between grids lines
adLIGO R&D 7LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Beam propagation paths to the optic, reflected back to the CCD camera port
adLIGO R&D 8LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T0802012.0” by ¼”optics S1 & S2 are parallel < 10 arc seconds.
Optic 1 in the test mass dummy is a 50% reflector.
Optic 2 in the
Reaction mass dummy is a 99% reflector
adLIGO R&D 9LIGO-G9900XX-00-M
50% BS
(TEST MASS)
HR
(REACTION MASS)
AUTO COLLIMATOR
MONITOR &
RETICLE PATTERN
OPTICAL AUTOCOLLIMATOR METHOD
adLIGO R&D 10LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Camera view from the autocollimator eyepiece showing a properly aligned reflection.
adLIGO R&D 11LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Reticle pattern and cross hair as image is retro-reflected +/- 30 minutes scale.
Our tolerance for the parallelism is .08 degrees (~0.5mins) so we need to split the space between the tick marks.
adLIGO R&D 12LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
Reticle pattern shown with optic shifted in pitch’d(up) and yaw’d (right)
adLIGO R&D 13LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
This demonstrates a typical image when both optics are pitch’d & yaw’d off.
adLIGO R&D 14LIGO-G9900XX-00-M
AdLIGO Bench Testing of Proposed Quad Alignment & Gap Setting Hardware
(Keyence)T080201
This image show both optics aligned in yaw, but the second optic is pitched up.
