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06:49
In situ Grazing Incidence Small Angle X-ray Scattering on Roll-To-Roll Coating of Organic Solar Cells with Laboratory X-ray Instrumentation
Published on: March 2, 2021
Grazing-incidence spectrometer for soft X-ray solar imaging spectroscopy
Fabio Frassetto1, Stefano Coraggia, Paolo Miotti
1National Council for Research of Italy- Institute of Photonics and Nanotechnologies (CNR-IFN), via Trasea 7, 35131-Padova, Italy.
Optics Express
|August 14, 2013
Summary
A new solar imaging spectrometer uses crossed cylindrical mirrors to separate imaging and spectral functions. This design enables high-resolution solar disk imaging in the 4-26 nm range for space applications.
Area of Science:
- Space instrumentation
- Solar physics
- Spectroscopy
Background:
- Solar imaging spectroscopy requires instruments capable of high spectral and spatial resolution.
- Traditional designs often face challenges in decoupling imaging and spectral functions, impacting performance.
Purpose of the Study:
- To present the design and realization of a stigmatic grazing-incidence instrument for solar imaging spectroscopy.
- To decouple imaging and spectral capabilities for enhanced performance in space applications.
Main Methods:
- Utilized an optical layout with crossed cylindrical mirrors to separate imaging and spectral focusing.
- Incorporated a double telescope system (Telescope I and II) and a grazing-incidence spectrograph with a variable-line-spaced grating.
- Mounted Telescope II crossed with respect to the grating and Telescope I to achieve functional decoupling.
Main Results:
- The realized instrument operates in the 4-26 nm spectral range.
- Achieved a field of view of 0.5 degrees, sufficient for imaging the full Sun disk.
- Maintained spectral resolution for off-axis angles due to the decoupled design.
Conclusions:
- The proposed optical design effectively decouples spectral and spatial focusing properties.
- The developed instrument is suitable for space-based solar imaging spectroscopy with preserved spectral resolution.
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