Design of a custom wideband camera for MISTRAL imager-spectrograph
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arXiv
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| Autores principales: | , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909333011300352 |
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| author | Muslimov, Eduard Schmitt, Jerome Adami, Christophe Dennefeld, Michel Ferrari, Marc |
| author_facet | Muslimov, Eduard Schmitt, Jerome Adami, Christophe Dennefeld, Michel Ferrari, Marc |
| contents | MISTRAL is a visible and near infrared imager and spectrograph working with the $1.93m$ telescope at L'Observatoire de Haute-Provence. The goal of the present project is to design and build one custom lens covering the entire working band 370-1000 nm with an enhanced throughput and resolution. The proposed design has the focal length of 100 mm with f/#=2 and consists of 5 lenses with 2 aspheres. It is capable to work in spectroscopy or direct imaging mode with the spectral resolving power up to R590-1675 or energy concentration of 84% within 1 pixel. The throughput varies from 79 to 98% in the main band of 400-1000 nm with a commercial AR coating and could be yet improved with a custom one. We also demonstrate that with this image quality can be maintained in a <10% margin with practically reachable tolerances. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01414 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Design of a custom wideband camera for MISTRAL imager-spectrograph Muslimov, Eduard Schmitt, Jerome Adami, Christophe Dennefeld, Michel Ferrari, Marc Instrumentation and Methods for Astrophysics MISTRAL is a visible and near infrared imager and spectrograph working with the $1.93m$ telescope at L'Observatoire de Haute-Provence. The goal of the present project is to design and build one custom lens covering the entire working band 370-1000 nm with an enhanced throughput and resolution. The proposed design has the focal length of 100 mm with f/#=2 and consists of 5 lenses with 2 aspheres. It is capable to work in spectroscopy or direct imaging mode with the spectral resolving power up to R590-1675 or energy concentration of 84% within 1 pixel. The throughput varies from 79 to 98% in the main band of 400-1000 nm with a commercial AR coating and could be yet improved with a custom one. We also demonstrate that with this image quality can be maintained in a <10% margin with practically reachable tolerances. |
| title | Design of a custom wideband camera for MISTRAL imager-spectrograph |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2410.01414 |