Phase grid-type interferential spectrometer for the near infrared.
For studying the spectrum of weak extended sources in the 1-2-microm wavelength region, a phase grid-type interferential spectrometer was made. Its principle consists of decoding by a phase grid a Fourier interferogram localized out of an appropriated plane-wave interferometer. Its description (resolving power is approximately 30,000), a comparison with other interferential spectrometers, and first experimental results are given.
Prat
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Universite de Paris VII, Groupe de Physique des Solides de l'Ecole Normale Superieure, 2 place Jussieu, 75221 Paris Cedex 05, France.
Benoit a la Guillaume
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Bisson
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