Concept and optical design of a compact cross-grating spectrometer

Bagusat, Verena; Kraus, Matthias H.; Förster, Erik; Thomae, Daniel; Hönle, Tobias; Brüning, Robert; Hillmer, Hartmut; Brunner, Róbert

doi:10.1364/josaa.36.000345

Cited by 13 publications

(6 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The optical design is based on a folded Czerny-Turner setup with an additional toric correction mirror [3]. The light is fed to the spectrometer by an optical fiber which works as the entrance pinhole.…”

Section: Optical Design and Implementationmentioning

confidence: 99%

See 1 more Smart Citation

Compact, astigmatism corrected cross-grating spectrometer

et al. 2020

Self Cite

View full text Add to dashboard Cite

Compact cross-grating spectrometers are inspired by classical high-end Echelle spectrometers and allow to acquire a large spectrum with a high spectral resolution in a single shot. To decrease the size of an Echelle spectrometer substantially, a cross grating was employed combining both required dispersive functionalities. First, an Echelle grating diffracts light in several higher diffraction orders, while a superposed, perpendicularly oriented cross-disperser is used in first diffraction order. In this contribution, we report on the realization of a cross-grating spectrometer employing a folded reflective beam path. A toric-convex mirror was introduced allowing aberration compensation. We present the basic concept and optical design of the system and discuss the mechanical implementation and the adjustment process. Here, different laser sources and gas emission lamps are used to realize the system and derive the optical performance. In particular, the spectral resolution in the different diffraction orders is determined for the realized device.

show abstract

Section: Optical Design and Implementationmentioning

confidence: 99%

“…However, they require a large volume and are very expensive [1]. Echelle-inspired cross-grating spectrometers are able to bridge the gap between these two instrumental concepts [2][3][4]. The cross-grating as the key element combines two dispersive functionalities in a single element which are separated in classical Echelle spectrometers.…”

Section: Introductionmentioning

confidence: 99%

Compact, astigmatism corrected cross-grating spectrometer

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…By detecting the spectral characteristics of SO 2 and the unknown UV absorber substance and employing spectral data inversion processing, the concentrations and distribution characteristics of these substances, as well as the identification of the components of the unknown UV absorber substance, can be obtained. This facilitates research on the habitability of the Venusian atmosphere and atmospheric radiative balance [27][28][29]. Atmospheric remote sensing detection technology utilizes remote sensing instruments to collect the spectral information of target objects.…”

Section: Introductionmentioning

confidence: 99%

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Zhang,

Fang,

et al. 2024

Remote Sensing

View full text Add to dashboard Cite

The spectroscopic detection of SO2 and unknown UV absorber substance in the H2SO4 cloud layer of Venus’ atmosphere is currently a focal point in the study of the habitability of Venusian atmospheric clouds. This paper addresses the simultaneous detection requirements of multiple substances in the ultraviolet range of Venus’ atmosphere and proposes a multi-channel hyperspectral imaging system design using pupil separation prisms and grating multilevel spectra. The system achieves a multi-channel design by splitting the entrance pupil of the telescope using prisms. Spectra from different channels are diffracted to the same detector through different orders of the grating. The system features a single spectrometer and detector, enabling simultaneous detection of spectra from different channels. It also boasts advantages such as compact size, ultra-high spectral resolution, and simultaneous multi-channel detection. The system design results indicate that within the working spectral range of three channels, the spectral resolution is better than 0.15 nm, surpassing previous in-orbit or current in-orbit planetary atmospheric detection spectrometers. With a Nyquist frequency of 56 lp/mm, the full-field MTF exceeds 0.7. The system’s smile is less than 0.05 μm, and the keystone is less than 0.04 μm, meeting the requirements for imaging quality.

show abstract

“…In recent years, the concept of Echelle-inspired cross-grating spectrometers was proposed aiming on compact devices which combine a high spectral resolution and a large spectral bandwidth [1][2][3][4] . Therefore, the two dispersive functionalities of a classical Echelle spectrometer are united in a single diffractive element.…”

Section: Introductionmentioning

confidence: 99%

Compact cross-grating spectrometer in double-pass configuration: design, implementation, and test

Kraus¹,

Hönle

Förster

et al. 2023

Next-Generation Spectroscopic Technologies XV

View full text Add to dashboard Cite

Echelle-inspired cross-grating spectrometers try to combine the high performance of classical Echelle spectrometers and the small footprint of compact line-grating spectrometers. Therefore, a cross-grating is used which is a superposition of two perpendicularly oriented line gratings in a single element. Highly resolved, but overlapping, diffractions orders are created by the main grating, which are separated by the cross-disperser. This powerful approach is connected to different challenges concerning the optical design, the fabrication of the cross-grating and implementation of the device. These challenges are addressed by a compact and rigid double-pass design, which utilizes the same refractive elements for collimation of the incoming beam and focusing of the diffracted light on the detector. This contribution gives an overview on the design and focusses on the implementation of the spectrometer. This includes on one hand the mounting of the cross-grating and the refractive elements in a rigid objective group and, on the other hand, the adjustment of the objective to the entrance fiber and the 2D detector. Furthermore, the implemented and calibrated instrument allows to conduct several validating experimental tests in order to proof the working principle. The spectrometer addresses a spectral range from 400 nm to 1100 nm and reaches a resolving power of 300 with an entrance pinhole diameter of 105 μm. An even higher resolving power of more than 1000 is reached with a reduced pinhole diameter of approximately 5 μm.

show abstract

Concept and optical design of a compact cross-grating spectrometer

Cited by 13 publications

References 9 publications

Compact, astigmatism corrected cross-grating spectrometer

Compact, astigmatism corrected cross-grating spectrometer

Multi-Channel Hyperspectral Imaging Spectrometer Design for Ultraviolet Detection in the Atmosphere of Venus

Compact cross-grating spectrometer in double-pass configuration: design, implementation, and test

Contact Info

Product

Resources

About