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Updated: Jun 16, 2026

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Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
Published on: February 3, 2023
Pressure-Scanned Echelle Grating plus Fabry-Perot Stellar Spectrophotometer
Applied Optics
|February 2, 2010
Abstract:
A photoelectric stellar spectrophotometer, with 0.3-A resolution, for use near Halpha (6563 A) is described. A Fabry-Perot etalon and an echelle grating are simultaneously pressure-scanned. The Fabry-Perot can be bypassed and the grating system used alone to obtain narrow-band (4.89-A) Halpha indices, in which case the pressure system allows the necessary radial velocity corrections to be made conveniently.
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