Thales

Olivier Chanal

Christophe Devilliers

Arnaud Liotard

Jean-Francois Blanc

Damiana Losa

Catherine Charbonnel

David Valentini

A method for correcting the thermoelastic effects on performance parameters of a telescope on board a space satellite, comprises a first step prior to the flight of the satellite consisting in determining, a priori, a correction of the thermoelastic effects by using a prior model of variations of the thermoelastic effects on the orbital scale and an algorithm for determining correction fed by programming data of the space satellite, and a second step carried out in flight, based on the correction determined a priori, consisting in establishing control messages of correction means for correcting the performance parameters of said telescope.

Method and device for correcting the thermoelastic effects, notably for a space telescope, and telescope comprising such a device

The invention relates to an optical instrument () comprising at least one mirror called the primary mirror (), placed in a cavity () and comprising an active face capable of being subjected to instantaneous variations of the incident radiative flux. According to the invention, the cavity () comprises a rigid internal casing () around the mirror consisting of a material having a thermal inertia so as to damp the instantaneous variations of the incident radiative flux thereby making it possible to limit the temperature fluctuations of this cavity and, consequently, the temperature fluctuations of the mirror. The invention applies to the space field.

Optical instrument comprising an entrance cavity in which a mirror is placed

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Cannes la Bocca, France

Olivier Chanal