Laser guide star absolute tilt recovery using a single auxiliary telescope

Abstract

ABSTRA C T It is shown that, using a pulsed laser to generate a laser guide star (LGS), a frame transfer technique at the focal plane of an auxiliary telescope can be used to retrieve the bidimensional tilt of such an LGS. We discuss how this approach can be used to reduce from two to one the number of auxiliary telescopes in the NGS-based perspective technique proposed in the literature. A discussion of the requirements for the laser pulse format is given.