Design of Dyson imaging spectrometers based on the Rowland circle concept

Carlos Montero-Orille; Xesús Prieto-Blanco; Héctor González-Núñez; Raúl de la Fuente

doi:10.1364/AO.50.006487

Design of Dyson imaging spectrometers based on the Rowland circle concept

Appl Opt. 2011 Dec 10;50(35):6487-94. doi: 10.1364/AO.50.006487.

Authors

Carlos Montero-Orille¹, Xesús Prieto-Blanco, Héctor González-Núñez, Raúl de la Fuente

Affiliation

¹ Departamento de Física Aplicada, Escola Universitaria de Óptica e Optometría, Universidade de Santiago de Compostela, 15782 Galicia, Spain.

PMID: 22193127
DOI: 10.1364/AO.50.006487

Abstract

We aim to show that Dyson imaging spectrometers can be easily designed by applying the concept of the Rowland circle to refracting surfaces. This allows us to conceive an analytical procedure that is based on the removal of astigmatism at two wavelengths. Following this procedure, high-optical-quality spectrometers can be designed even for high speeds. Root-mean-square spot radii less than 2.5 μm are obtained for speeds as high as f/1.5, slit lengths of 15 mm, and wavelength ranges of 0.4-1.7 μm. Design examples are presented for classical Dyson spectrometers in which the detector is glued to the glass plane surface and for spectrometers with an air gap between this surface and the image plane.