The Offner imaging spectrometer in quadrature.
This 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 importance.
Prieto-Blanco
Xesús
X
Departamento de Física Aplicada, Escola Universitaria de Optica e Optometría, Universidade de Santiago de Compostela, 15782 Galicia, Spain.
Montero-Orille
Carlos
C
González-Nuñez
Héctor
H
Mouriz
María Dolores
MD
Lago
Elena López
EL
de la Fuente
Raúl
R