A high-resolution, flat-field, plane-grating, spectrometer based on the novel design proposed by Gil and Simon [Appl. Opt. 22, 152 (1983)] is demonstrated. The spectrometer design employs off-axis parabolic collimation and camera mirrors in a configuration that eliminates spherical aberrations and minimizes astigmatism, coma, and field curvature in the image plane. In accordance with theoretical analysis, the performance of this spectrometer achieves a high spatial resolution over the large detection area, which is shown to be limited only by the quality of its optics and their proper alignment within the spatial resolution of a pixelated CCD detector. With a grating in first order, the measured spectral resolving power of allows the clear resolution of the violet doublet at 419.07 and .
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Juan M. Simon, Mirta A. Gil, and Angela N. Fantino
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