New family of refractive imaging spectrographs

Details New family of refractive imaging spectrographs New family of refractive imaging spectrographs

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2863..287w&link_type=abstract

Proc. SPIE Vol. 2863, p. 287-294, Current Developments in Optical Design and Engineering VI, Robert E. Fischer; Warren J. Smith;

Computer Science

Scientific paper

We describe a new form of prism spectrograph system based on aplanatic principles. The basic system is simple, comprising a prism with two spherical refracting surfaces, both operating near their aplanatic conjugates, and a spherical mirror operating near its center of curvature. This form provides a flat, accessible focal surface suitable for use with modern array detectors. Good image quality can be maintained over large wavelength intervals at fast focal ratios, making this form particularly useful for moderate resolution spectrography. Its simplicity, compactness, and tolerance of misalignment make it attractive for space and cryogenic instruments. We present there examples of operating instruments that have been constructed using this new form.

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