Patent ID: 8395764

Claim:
A device for measuring a line of sight jitter of an optical instrument that comprises an observation path, and said optical instrument is mounted on an optical platform, said device comprising: an optical measurement path that is common with the observation path of the optical instrument; a light measurement source that is arranged at one end of the optical observation path; a detector for measuring the optical beam that comes from the light measurement source, arranged in such a way that the measurement beam has passed through the optical observation path at least once; and at least one light reference arranged on the optical measurement path, at least one passive isolator of the light reference with regard to lateral vibrations transmitted by the optical platform in a predetermined range of frequencies, thus creating a pseudo-inertial light reference, the at least one passive isolator comprising a segment in the form of an elastomer beam that is suitable for filtering the lateral vibrations that are imposed on its support in the predetermined frequency range, and the at least one passive isolator is made of flexible material with a damping coefficient, or an elastomer material with a damping coefficient, with a so-called “diabolo” convergent/divergent cross-section.