LIGO Document E1300128-v1

aLIGO Interferometer Optics Positions and Orientations for Initial Alignment

Document #:
LIGO-E1300128-v1
Document type:
E - Engineering documents
Other Versions:
LIGO-E1300128-v3
09 Feb 2017, 11:02
Abstract:
Why another optical layout calculation? The Zemax optical layouts are non-sequential models which are aligned "by hand". The optic positions and orientations are tweaked iteratively by the Zemax user, much as one would align the real interferometer. This results in small positional and angular errors and positional/angular data which change for each new release of the Zemax layout.
This optical layout calculation uses vector analysis in Mathematica, with as-built/assigned optic parameters (not just nominal values) so that it is a definitive source of positional/angular data for the Initial Alignment System (IAS) and calculations of IAS alignment solutions. It also serves as a sanity check on the Zemax optical layouts and IO PRC layouts.

Note that the Zemax layouts reported in D0901920 (H1) and D0902216 (L1) are the sources for positional information for the primary interferometer optics for SolidWorks (CAD), with the exception of the PRC optics (PRM, PR2 and PR3). The PRC optic positions for SolidWorks are defined in the IO documents E1100492 (LHAM2), E1100493 (LHAM3), E1100494 (WHAM2) and E1100495 (WHAM3).

Authors:

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