Overview on grating developments at ESA

Guldimann, Benedikt; Deep, A.; Vink, Ramon

doi:10.1007/s12567-015-0095-z

Cited by 8 publications

(4 citation statements)

References 11 publications

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“…More details about successful missions can be found in a review paper. 16 Binary surface relief gratings design approximate for binary gratings (as shown in fig. 8) enable efficient coupling into first-order diffraction.…”

Section: Proposed Alternative Solutionmentioning

confidence: 99%

Spectrograph design for the Asgard/BIFROST spectro-interferometric instrument for the VLTI

Chhabra

Frangiamore

Kraus

et al. 2022

Optical and Infrared Interferometry and Imaging VIII

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The BIFROST instrument will be the first VLTI instrument optimised for high spectral resolution up to R=25,000 and operate between 1.05 and 1.7 µm. A key component of the instrument will be the spectrograph, where we require a high throughput over a broad bandwidth. In this contribution, we discuss the four planned spectral modes (R=50, R=1000, R=5000, and R=25,000), the key spectral windows that we need to cover, and the technology choices that we have considered. We present our plan to use Volume Phase Holographic Gratings (VPHGs) to achieve a high efficiency > 85%. We present our preliminary optical design and our strategies for wavelength calibration.

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Section: Proposed Alternative Solutionmentioning

confidence: 99%

Spectrograph design for the Asgard/BIFROST spectro-interferometric instrument for the VLTI

Chhabra

Frangiamore

Kraus

et al. 2022

Optical and Infrared Interferometry and Imaging VIII

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“…7. This kind of disperser has been developed during the pre-development activities of the CarbonSat candidate mission by Fraunhofer Institute for Applied Optics and Precision Engineering (IOF) in Jena, Germany [27].…”

Section: Diffraction Gratingsmentioning

confidence: 99%

The Copernicus CO2M mission for monitoring anthropogenic carbon dioxide emissions from space

Sierk

Fernandez²,

Bézy³

et al. 2021

International Conference on Space Optics — ICSO 2020

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The European Space Agency (ESA), in collaboration with the European Commission (EC) and EUMETSAT, is developing a space-borne observing system for quantification of anthropogenic carbon dioxide (CO 2 ) emissions. Forming part of the EC's Copernicus programme, the CO 2 monitoring (CO2M) mission will be implemented as a constellation of identical satellites, to be operated over a period of at least 7 years and measuring CO 2 concentration in terms of column-averaged mole fraction (denoted as XCO 2 ). Each satellite will continuously image XCO 2 along the satellite track on the sun-illuminated part of the orbit, with a swath width of >250 km. Observations will be provided at a spatial resolution of 2 x 2 km 2 , with high precision (<0.7 ppm) and accuracy (bias <0.5 ppm). To this end, the payload comprises a suite of instruments addressing the various aspects of the challenging observation requirements: A push-broom imaging spectrometer will perform co-located measurements of top-of-atmosphere radiances in the Near Infrared (NIR) and Short-Wave Infrared (SWIR) at high to moderate spectral resolution

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“…On each arm, the pupil mirrors are freeform gratings, with the groove orientated vertically (parallel to the slices). The spectrum is finally imaged onto the detector (8) via a folding mirror (7). The system is composed of 2 identical and symmetrical arms.…”

Section: The Design Of Igis (Integrated Grating Imaging Spectrograph)mentioning

confidence: 99%

“…6 Most importantly being the fact that the gratings are produced with almost no random or periodic errors, resulting in minimum stray light. 7 However, when it comes to producing blazed grating by way of holography, the creation of the grooves by ion etching technologies or electron beam lithography requires a complex set-up. Although diamond machined gratings cannot yet compete with holographic ones in term of stray light, they appear to be ideal candidates for systems where the mechanical properties of the substrate is imposed for the purpose of athermalization for example, and/or for use in harsher environmental conditions where the photoresist is not an option.…”

Section: Introductionmentioning

confidence: 99%