Interferometer maintaining optical relationship between...

G - Physics – 01 – J

Patent

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G01J 3/02 (2006.01) G01B 9/02 (2006.01) G01J 3/453 (2006.01)

Patent

CA 2674571

An interferometer (1) for Fourier transform infrared spectroscopy includes a fixed assembly (40) including a housing (41), a beam splitter (4), and a mirror (9) fixedly positioned relative to each other. A movable assembly (22) includes a housing (21), a mirror (8), and a motor coil (25), fixedly positioned relative to each other. A first flat spring (27a) has an opening for providing an unobstructed optical path of radiation therethrough. A first end of the first flat spring is secured to the fixed assembly and a second end of the first flat spring is secured to the movable assembly for providing movement of the movable assembly relative to the fixed assembly via the first flat spring. An optical relationship between the beam splitter, the mirror of the fixed assembly, and the mirror of the movable assembly is maintained independent of a distance between the movable assembly and the fixed assembly.

Interféromètre (1) pour spectroscopie infrarouge à transformée de Fourier, comportant un ensemble fixe (40) comprenant un boîtier (41), un séparateur de faisceau (4), et un miroir (9) fixes les uns par rapport aux autres. Un ensemble mobile (22) comprend un boîtier (21), un miroir (8), et une bobine moteur (25) fixes les uns par rapport aux autres. Un premier ressort plat (27a) présente une ouverture offrant à un rayonnement un trajet optique libre. Une première extrémité du premier ressort plat est attachée à l'ensemble fixe et une deuxième extrémité du premier ressort plat est attachée à l'ensemble mobile pour permettre le mouvement de l'ensemble mobile par rapport à l'ensemble fixe grâce au premier ressort plat. Une relation optique entre le séparateur de faisceau, le miroir de l'ensemble fixe et le miroir de l'ensemble mobile est maintenue indépendamment de la distance entre l'ensemble mobile et l'ensemble fixe.

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