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Wide-field imaging FTS at high spectral resolution

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Abstract

Spectral imaging of galaxy clusters, nearby galaxies, galactic molecular clouds, planetary nebulae, supernovae remnants, star clusters, calls for a several arc minute-field instrument. Access to a high spectral resolution (R ≥ 104) is also often highly desirable, in particular for the analysis of the gas content of these extended regions. The two conditions can be theoretically realized with an Imaging FTS. Providing the RΩ condition is satisfied, the main constraint comes from the required flatness of the interfering wavefronts over the field, which controls the fringe contrast. Two examples are given, one in the visible, the other one in the mid-infrared domain. They imply two different optical layouts of the interferometer.

© 2009 Optical Society of America

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