RT Journal Article
T1 Astigmatism in the basic Offner spectrometer
A1 González Núñez, Héctor
A1 Montero Orille, Carlos
A1 Fuente Carballo, Raúl de la
K1 Offner spectrometer
K1 Rowland configuration
K1 Concentric systems
K1 Astigmatism
K1 Optical system design
AB The in-plane configuration of the basic Offner spectrometer is revised. The locations of meridional and sagittal images of the slit center are analyzed when the slit is displaced in the axial direction from the usual configuration, whereas its center is kept on the Rowland circle of the concave mirror. This translates the position of the sagittal image plane and allows for the cancellation of astigmatism and meridional coma for two wavelengths while these aberrations are kept small over the whole spectral range. This is accomplished without splitting the concave mirror into two different mirrors, simplifying the design and its practical implementation. A design example is presented with excellent optical performance
PB Elsevier
YR 2021
FD 2021
LK http://hdl.handle.net/10347/27311
UL http://hdl.handle.net/10347/27311
LA eng
NO Optik 247 (2021) 167873
NO Xunta de Galicia, Consellería de Educación, Universidades e FP, Spain, Grant GRC number ED431C2018/11 and ED431E2018/08
DS Minerva
RD 23 abr 2026