Astronomy and Astrophysics – Astronomy
Scientific paper
May 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26as..123..179o&link_type=abstract
A & A Supplement series, Vol. 123, May II 1997, 179-182.
Astronomy and Astrophysics
Astronomy
5
Instrumentation: Miscellaneous, Instrumentation: Polarimeters
Scientific paper
The optical characteristics of birefringent materials transmitting in the near IR (0.9-2.5 microns) are analyzed. Wollaston prisms with large beam separation and virtually free from lateral chromatism -- e.g. with fields of view $>1$ arcmin and image elongation ! 3 cm^{-1}) beyond 2.25 microns. The absorption does not decrease significantly when the crystals is cooled, CaCO_3 should not be therefore used in instruments working beyond 2.0 microns.
Caruso Alberto
Ciofini Marco
Gennari Sandro
Oliva Ernesto
Vanzi Leonardo
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