Prieto Blanco, XesúsMontero Orille, CarlosGonzález Núñez, HéctorMouriz Cereijo, María DoloresLópez Lago, María ElenaFuente Carballo, Raúl de la2020-06-062020-06-062010Xesús Prieto-Blanco, Carlos Montero-Orille, Héctor González-Nuñez, María Dolores Mouriz, Elena López Lago, and Raúl de la Fuente, "The Offner imaging spectrometer in quadrature," Opt. Express 18, 12756-12769 (2010)1094-4087http://hdl.handle.net/10347/22875This is a proposal and description of a new configuration for an Offner imaging spectrometer based on the theory of aberrations of off-plane classical-ruled spherical diffraction gratings. This new spectrometer comprises a concave mirror used in double reflection and a convex reflection grating operating in quadrature, in a concentric layout. A very simple procedure obtains designs that are anastigmatic for a given point on the entrance slit and a given wavelength. Specific examples show that the performance of this type of system improves the performance of analogous conventional in-plane systems, when compactness and/or high spectral resolution is of fundamental importanceeng© 2010 Optical Society of Americajournal article10.1364/OE.18.012756open access