The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: characterization of two VPHG prototypes based on dichromated gelatin and photopolymer recording materials
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| Title: | The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: characterization of two VPHG prototypes based on dichromated gelatin and photopolymer recording materials |
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| Authors: | Jeanneau, Alexandre, Bianco, Andrea, Clawson, Andrew, Frangiamore, Michele, Pearson, Elroy, Pinard, Laurent, Schmoll, Jürgen, Richard, Johan, Giroud, Rémi, Laurent, Florence, Bacon, Roland |
| Contributors: | Centre de Recherche Astrophysique de Lyon (CRAL), École normale supérieure de Lyon (ENS de Lyon), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des matériaux avancés (LMA), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique des 2 Infinis de Lyon (IP2I Lyon) |
| Source: | Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI ; https://hal.science/hal-04800808 ; Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation VI, 2024, Yokohama, Japan. pp.210, ⟨10.1117/12.3019944⟩ |
| Publisher Information: | CCSD SPIE |
| Publication Year: | 2024 |
| Collection: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| Subject Terms: | VPHG dichromated gelatin photopolymer diffraction efficiency spectrograph BlueMUSE, VPHG, dichromated gelatin, photopolymer, diffraction efficiency, spectrograph, BlueMUSE, [PHYS.ASTR.IM]Physics [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] |
| Subject Geographic: | Yokohama, Japan |
| Description: | International audience ; Volume-phase holographic gratings (VPHGs) are widely used in astronomical spectrographs due to their adaptability and high diffraction efficiency. Most VPHGs in operation use dichromated gelatin as a recording material, whose performance is sensitive to the coating and development process, especially in the near-UV. In this letter, we present the characterization of two UV-blue VPHG prototypes for the BlueMUSE integral field spectrograph on the VLT, based on dichromated gelatin and the Bayfol®HX photopolymer film as recording materials. Our measurements show that both prototypes meet the required diffraction efficiency and exhibit similar performance with a wavelength-average exceeding 70% in the 350-580 nm range. Deviations from theoretical models increase towards 350 nm, consistently with previous studies on similar gratings. We also report similar performances in terms spatial uniformity and grating-to-grating consistency. Likewise, no significant differences in wavefront error or scattered light are observed between the prototypes. |
| Document Type: | conference object |
| Language: | English |
| Relation: | info:eu-repo/semantics/altIdentifier/arxiv/2406.13913; ARXIV: 2406.13913; INSPIRE: 2856056 |
| DOI: | 10.1117/12.3019944 |
| Availability: | https://hal.science/hal-04800808 https://hal.science/hal-04800808v1/document https://hal.science/hal-04800808v1/file/131005L.pdf https://doi.org/10.1117/12.3019944 |
| Rights: | info:eu-repo/semantics/OpenAccess |
| Accession Number: | edsbas.C3A0C85F |
| Database: | BASE |
Nájsť tento článok vo Web of Science | Abstract: | International audience ; Volume-phase holographic gratings (VPHGs) are widely used in astronomical spectrographs due to their adaptability and high diffraction efficiency. Most VPHGs in operation use dichromated gelatin as a recording material, whose performance is sensitive to the coating and development process, especially in the near-UV. In this letter, we present the characterization of two UV-blue VPHG prototypes for the BlueMUSE integral field spectrograph on the VLT, based on dichromated gelatin and the Bayfol®HX photopolymer film as recording materials. Our measurements show that both prototypes meet the required diffraction efficiency and exhibit similar performance with a wavelength-average exceeding 70% in the 350-580 nm range. Deviations from theoretical models increase towards 350 nm, consistently with previous studies on similar gratings. We also report similar performances in terms spatial uniformity and grating-to-grating consistency. Likewise, no significant differences in wavefront error or scattered light are observed between the prototypes. |
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| DOI: | 10.1117/12.3019944 |