A Four-Lens Combined Field and Dispersion Corrector Giving Telecentric Imagery Over a Field Diameter of 1.5-DEG

Details A Four-Lens Combined Field and Dispersion Corrector Giving Telecentric Imagery Over a Field Diameter of 1.5-DEG A Four-Lens Combined Field and Dispersion Corrector Giving Telecentric Imagery Over a Field Diameter of 1.5-DEG

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.265..747w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 265, NO. 3/DEC1, P. 747, 1993

Astronomy and Astrophysics

Astronomy

4

Instrumentation: Spectrographs - Techniques: Spectroscopic

Scientific paper

The requirements for efficient fibre-fed multi-object spectroscopy are discussed, namely a telescope field corrector giving good imagery over a wide field, with atmospheric dispersion correction and telecentric illumination, combined in a simple optical system. Two examples are given of such designs, one for a Cassegrain and one for a Ritchey-Chrétien telescope. Each covers a field of 1°.5 diameter, and consists of four spherical-surfaced thin lenses (six air-glass surfaces). These correctors have been designed for a projected 4-m telescope.

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