TMS Telescope Alignment

Document #:

LIGO-T1100258-v4

Document type:

T - Technical notes

Abstract:

Autocollimators and a Shack-Hartmann sensor are used to align the TMS Telescope. Two alignment methods are presented: alignment by double pass retro-reflection from a curved ETMHR surrogate mirror, and double pass retro-reflection from a flat mirror. A step-by-step procedure is presented, together with actual data from the Shack-Hartmann sensor during the alignment procedure. Optical aberration theory is used to derive a relationship between the Zernike astigmatic coefficient and the Guoy phase error at the focal plane of the TMS sensing system. The ZEMAX focus parameters for an ideal off-axis parabolic telescope agree with the ABCD Gaussian beam propagation calculations.

Files in Document:

• T1100258-v4TMS Telescope Alignment.pdf (3.4 MB)

Other Files:

• T1100258-v4TMS Telescope Alignment.doc (25.2 MB)

Topics:

• Auxiliary Optics
• Final Design

Authors:

• Michael Smith
• Virginio Sannibale

Keywords:

TMS AOS

Notes and Changes:

Added Sec. 3.3.4 Telescope Performance with Non-Gaussian Input Beams

Referenced by:

• LIGO-T1100603-v2: TMS Telescope Alignment Procedure