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OwnerDenis Simeoni, Olivier Pigouche +2inventors
InventorsDenis Simeoni, Olivier Pigouche, Bruno Chetrite, Christian Buil
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The invention pertains to a static interferometry system comprising two mirrors produced respectively by vertical assemblage (EH) and horizontal assemblage (EV) of a set of parallel plates of constant width, shifted along the optical axis so as to form stairs of variable optical path difference, the said two staircase mirrors (EH, EV) being disposed orthogonally so as to form, by optical superposition, a set of square facets engendering different optical path differences for the incident signal, and a detection device (DET) for detecting the set of optical path differences of the resulting interferogram. The system comprises, furthermore, means of continuous variation (LC) of the optical path difference during the acquisition of data by the detection device (DET), and sampling means (S, ACQL) for sampling the continuous optical path difference acquired while complying with the Nyquist criterion.
Static interferometry system comprising two mirrors produced respectively by vertical assemblage (EH) and horizontal assemblage (EV) of a set of parallel plates of constant width, shifted along the optical axis so as to form stairs of variable optical path difference, the said two staircase mirrors (EH, EV) being disposed orthogonally so as to form, by optical superposition, a set of square facets engendering different optical path differences for the incident signal, and a detection device (DET) for detecting the set of optical path differences of the resulting interferogram, characterized in that it comprises, furthermore, means of continuous variation (LC) of the optical path difference, and sampling means (S, ACQL) for sampling the continuous optical path difference acquired while complying with the Nyquist criterion.
Static interferometry method using two mirrors produced respectively by vertical assemblage (EV) and horizontal assemblage (EH) of a set of parallel plates of constant width, shifted along the optical axis so as to form stairs of variable optical path difference, the said two staircase mirrors being disposed orthogonally so as to form, by optical superposition, a set of square facets engendering different optical path differences for the incident signal, and a detection device (DET) for detecting the set of optical path differences of the resulting interferogram, characterized in that the optical path difference is varied continuously during the acquisition of data by the detection device, and the continuous optical path difference acquired is sampled while complying with the Nyquist criterion.
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