Aberration-corrected aspheric grating designs for the Lyman/Far-Ultraviolet Spectroscopic Explorer high-resolution spectrograph - A comparison

Physics – Optics

Scientific paper

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Aberration, Far Ultraviolet Radiation, Gratings (Spectra), Optical Correction Procedure, Spectrographs, Ultraviolet Spectroscopy, Asphericity, Grooves, Rowland Circles, Satellite-Borne Instruments, Substrates

Scientific paper

Two approaches to reducing the optical aberrations of concave diffraction gratings have been studied to obtain candidate grating designs for the Lyman/Far-Ultraviolet Spectroscopic Explorer mission. The first approach involves shaping the grating substrate while using straight and equally spaced grooves. The second approach involves using a gating substrate with a relatively simple figure and holographically controlling the groove curvature and spacing. Specific designs derived from both approaches are analyzed and compared.

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