LIGO Document M1100272-x0

RODA to Incorporate In-vacuum Periscopes for ETM HR Video Cameras

Document #:
LIGO-M1100272-x0
Document type:
M - Management or Policy
Abstract:
A decision is made:
1) to allow the incorporation of in-vacuum periscopes to enable external video camera views of the entire HR surface of the ETMs; these in-vacuum periscopes will be used for the H1, L1, and H2 ETMs.
2) to not allow the ETM HR video camera optical path to be shared with the optical paths of either the Photon Calibrators or the Optical Levers for the ETM HR mirrors.

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