LIGO Document T0900453-v2
- The purpose of this technical note is to describe the ellipticity and wavefront distortion of a parabolic telescope and a hybrid ETM Telescope, comprised of an off-axis parabolic primary mirror and a 1) spherical secondary mirror, or 2) triplet lens secondary. The telescope is part of the Transmon System for aLIGO.
- Changed the title. Changed the abstract. Added triplet lens secondary case.
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