A design of supporting structure for realizing large-field-of-view and high-resolution off-axis three-mirror optical system

Yang, Guang; Ai, Li; Li, Shuangcheng; Zhang, Rongjia; Wang, Yan; Gu, Cang; Zheng, Yanping

doi:10.1007/s12596-022-00965-2

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2022

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“…The spectral resolution difference from the nonuniform spot size is big. To overcome the inhomogeneity of the spot size, Yinxin Zhang [47] and Zengpeng Yang [48] both replaced the single imaging mirror with the three-mirror anti-astigmatism optical system. All the methods above are beneficial to optimizing the cross-dispersed optical system.…”

Section: Collimating/focusing Opticsmentioning

confidence: 99%

Echelle Grating Spectroscopic Technology for High-Resolution and Broadband Spectral Measurement

Zhang

Duan

et al. 2022

Applied Sciences

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Echelle grating provides high spectral resolving power and diffraction efficiency in a broadband wavelength range by the Littrow mode. The spectrometer with the cross-dispersed echelle scheme has seen remarkable growth in recent decades. Rather than the conventional approach with common blazed grating, the cross-dispersed echelle scheme achieves the two-dimensional spatial distribution of the spectrum by one exposure without scanning in the broadband spectral range. It is the fastest and most sensitive spectroscopic technology as of now, and it has been extensively applied in commercial and astronomical spectrometers. In this review, we first highlight the characteristics of the echelle and then present the optical layout, detection approach, and method of calibration. Finally, we discuss the state-of-the-art implementations and applications of commercial and astronomical instruments.

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Section: Collimating/focusing Opticsmentioning

confidence: 99%