Improvements in interferometer devices, especially for...

Details Improvements in interferometer devices, especially for... Improvements in interferometer devices, especially for...

G - Physics

01

J

88/0.2

G01J 3/26 (2006.01) G01J 3/45 (2006.01) G01J 3/453 (2006.01)

Patent

CA 2017748

ABSTRACT OF THE DISCLOSURE A two-channel multiplex Fourier transform spectrometry interferometer device comprises two semi- reflecting mirrors substantially in alignment with each other between two reflecting surfaces substantially parallel to each other and to a mean plane containing the semi-reflecting mirrors. At least one of the mirrors and surfaces is inclined by a non-zero amount to the mean plane. The algebraic sum of the inclinations of the semi-reflecting mirrors relative to the mean plane is different than the sum of the inclinations of the reflective surfaces relative to said plane. At least one prismatic blade means with an index of refraction different than that of the remainder of the interferometer device is disposed between one of the semi-reflecting mirror and one of the reflective surfaces. The algebraic differences of the prismatic blade angles are different to either side of the mean plane. For earth spectrometry the device is mounted on an aircraft or a satellite, for example, moving relative to the earth.

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