Near infrared astronomical light collector

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Abstract
A 4-m aperture light collector has been built using the mosaic principle specifically for high resolution stellar spectroscopy in the near infrared by the Fourier multiplex technique. The most novel feature is complete servo control of all optical elements to bring individual images to a common point. Initial goals were a spectral survey of ir objects, and the testing of techniques for a larger future collector. However, the project has been stopped by lack of interest and support; the finished collector will not be used.