Design of Compact Long-Slit Wynne-Offner Spectrometer for Hyperspectral Remote Sensing

Zhu, Jian Feng; Shen, Weimin

doi:10.1007/978-3-030-56488-9_21

Cited by 1 publication

(1 citation statement)

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“…It had superior anastigmatism performance and allowed a longer slit while maintaining compactness. Meanwhile, it maintained concentricity and inherited the distortion-free characteristic of the classical Offner configuration [26]. The system included two folding mirrors, a lens-grating and a concave mirror.…”

Section: Resultsmentioning

confidence: 99%

High-Precision Ultra-Long Air Slit Fabrication Based on MEMS Technology for Imaging Spectrometers

Ren,

Yao,

Zhu

et al. 2023

Micromachines

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The increasing demand for accurate imaging spectral information in remote sensing detection has driven the development of hyperspectral remote sensing instruments towards a larger view field and higher resolution. As the core component of the spectrometer slit, the designed length reaches tens of millimeters while the precision maintained within the μm level. Such precision requirements pose challenges to traditional machining and laser processing. In this paper, a high-precision air slit was created with a large aspect ratio through MEMS technology on SOI silicon wafers. In particular, a MEMS slit was prepared with a width of 15 μm and an aspect ratio exceeding 4000:1, and a spectral spectroscopy system was created and tested with a Hg-Cd light source. As a result, the spectral spectrum was linear within the visible range, and a spectral resolution of less than 1 nm was obtained. The standard deviation of resolution is only one-fourth of that is seen in machined slits across various view fields. This research provided a reliable and novel manufacturing technique for high-precision air slits, offering technical assistance in developing high-resolution wide-coverage imaging spectrometers.

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Section: Resultsmentioning

confidence: 99%