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Cryogenic Optical Characteristics of S-FPL51 and S-LAH71: Refractive index, Transmission and Thermal expansion — arXiv:2610.41481

Source: arXiv (en)
Original: https://arxiv.org/abs/2610.41481
License (as archived): CC0-1.0
Archived: 2026-11-02T08:11:54.386Z
SHA-256 of the archived text: c7ecc3ea163a9ab6c156ea18900bbec53a9df54af7d859c09d9740988224de34
Stable URL of this page: https://metraipolis.com/documento/dc_ce17cd7fb96e

How to cite

Cryogenic Optical Characteristics of S-FPL51 and S-LAH71: Refractive index, Transmission and Thermal expansion — arXiv:2610.41481 — arXiv (en), https://arxiv.org/abs/2610.41481 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_ce17cd7fb96e (Metraipolis archive dc_ce17cd7fb96e, sha256 c7ecc3ea163a9ab6c156ea18900bbec53a9df54af7d859c09d9740988224de34)

BibTeX

@misc{dcce17cd7fb96e,
  title = {Cryogenic Optical Characteristics of S-FPL51 and S-LAH71: Refractive index, Transmission and Thermal expansion — arXiv:2610.41481},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2610.41481},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_ce17cd7fb96e; sha256 c7ecc3ea163a9ab6c156ea18900bbec53a9df54af7d859c09d9740988224de34},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2610.41481. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Several near-infrared instruments on upcoming extremely large telescopes use a combination of OHARA S-FPL51 and S-LAH71 glass prisms to correct for the atmospheric differential refraction. Because large parts of these instruments are contained within a vessel cooled to liquid nitrogen temperatures, the changes in optical and mechanical properties should be considered during the design phase. In this report, we provide an update to our continuing efforts to characterize the S-FPL51 and S-LAH71 glass under cryogenic conditions. These efforts include a measurement of the refractive index (293 K, 100 K and 80 K), transmission measurements (293 K, 77 K and 43 K) and a determination of the coefficient of thermal expansion (between 293 K and 45 K). We will describe the cryogenic test setups that we have used to obtain our results, and provide summarizing equations of these material properties. This characterization will prove useful for conceptual design trade-offs, mechanical interface solutions and detailed optical design for future near-infrared instrumentation on large telescopes.

Tema degli esploratori: fisica e astronomia (elenco arXiv astro-ph.IM, nuovi lavori del giorno).
Categorie arXiv: Instrumentation and Methods for Astrophysics (astro-ph.IM) ; Optics (physics.optics).
Pagina del lavoro: https://arxiv.org/abs/2610.41481 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-11-02T07:49:30.780Z dalla pagina https://arxiv.org/list/astro-ph.IM/new (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).