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Astigmatism-free Czerny–Turner compact spectrometer with cylindrical mirrors

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Abstract

A modified optical design for a broadband, high resolution, astigmatism-free Czerny–Turner spectrometer is proposed. Astigmatism is corrected by using cylindrical mirrors over a broad spectral range. The theory and method for astigmatism correction are thoroughly analyzed. The comparison between the modified Czerny–Turner spectrometer and the traditional Czerny–Turner spectrometer is also described in detail. The ray-tracing results show that the RMS spot radius has decreased to 4.2 μm at the central wavelength and 17 μm at the wedge wavelength.

© 2017 Optical Society of America

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