Anuncio
ESO firma contrato para el pulido del espejo secundario del E-ELT
La empresa francesa Reosc pulirá el espejo secundario de mayor tamaño jamás construido
6 de Julio de 2016
ESO acaba de firmar un contrato con la compañía francesa Reosc [1], una filial de Safran Electronics & Defense, para pulir el espejo secundario del futuro European Extremely Large Telescope (E-ELT) de ESO a partir de una pieza en blanco preformada de vidrio cerámico. Reosc diseñará el espejo y su sistema de montaje, pulirá la superficie, y llevará a cabo todas las pruebas ópticas necesarias antes de la entrega final, la que se espera para el año 2022.
El contrato fue firmado por el Director General de ESO, Tim de Zeeuw y M. Thierry Batut, Presidente de Reosc, en presencia de M. Jean-Claude Brunet, el Cónsul General de Francia en Múnich, otros altos representantes de Reosc y miembros importantes del personal de ESO.
El espejo secundario es, como su nombre lo indica, el segundo de cinco espejos que guiarán la luz emitida por objetos distantes a través del telescopio, para finalmente converger en el foco Nasmyth del mismo, en donde se encontrarán un conjunto de instrumentos científicos. Colgando, de manera invertida, en la parte superior de la estructura del telescopio, por encima del espejo primario de 39 metros, este será el espejo secundario de mayor tamaño alguna vez empleado en un telescopio y el mayor espejo convexo nunca antes producido. Con más de 4 metros de diámetro, posee la misma magnitud que los espejos primarios de muchos telescopios profesionales de primera clase. La forma y el pulido del espejo se llevarán a cabo con una precisión de 15 nanómetros (15 millonésimas de milímetro) aplicada sobre la superficie óptica [2]. Debido a que este es un espejo asférico altamente convexo, su fabricación representa un desafío considerable y el resultado será un ejemplo verdaderamente notable de ingeniería óptica de precisión (al igual que con muchos elementos del E-ELT, este será una real innovación en esta área de la tecnología).
Notas
[1] Reosc, una filial de Sagem, empresa de alta tecnología perteneciente al grupo Safran, es líder mundial en el diseño, producción e integración de óptica de alto rendimiento, para campos como la astronomía, el espacio y los láseres de alta energía, además de la industria de los semiconductores. Reosc desarrolla y produce óptica de alto rendimiento para satélites, grandes telescopios y láseres de alta energía, así como para la industria de los semiconductores. La compañía también construyó los espejos de una sola pieza para el Very Large Telescope de ESO, cada uno de 8 metros, así como el telescopio internacional Gemini, el espejo de 11 metros para el Gran Telescopio de Canarias, espejos para el instrumento europeo Nirspec instalado en el telescopio espacial James Webb de la NASA, y los espejos para la sonda espacial GAIA de la ESA.
[2] Si el espejo tuviese 700 km de diámetro (la distancia entre la Sede de ESO en Garching, Alemania, y la planta de Reosc en Saint-Pierre-du-Perray, en Francia) la precisión correspondería a sólo 3 mm.
Enlaces
- ESOcast 84: Se devela el nuevo diseño del E-ELT
- REOSC se adjudica el contrato para la construcción de los espejos adaptativos del E-ELT
Contactos
Richard Hook
Encargado de Prensa de ESO
Garching bei München, Alemania
Tel: +49 89 3200 6655
Teléfono celular: +49 151 1537 3591
Correo electrónico: rhook@eso.org
Sobre el anuncio
| Identificador: | ann16045 |
Imágenes
Our use of Cookies
We use cookies that are essential for accessing our websites and using our services. We also use cookies to analyse, measure and improve our websites’ performance, to enable content sharing via social media and to display media content hosted on third-party platforms.
ESO Cookies Policy
The European Organisation for Astronomical Research in the Southern Hemisphere (ESO) is the pre-eminent intergovernmental science and technology organisation in astronomy. It carries out an ambitious programme focused on the design, construction and operation of powerful ground-based observing facilities for astronomy.
This Cookies Policy is intended to provide clarity by outlining the cookies used on the ESO public websites, their functions, the options you have for controlling them, and the ways you can contact us for additional details.
What are cookies?
Cookies are small pieces of data stored on your device by websites you visit. They serve various purposes, such as remembering login credentials and preferences and enhance your browsing experience.
Categories of cookies we use
Essential cookies (always active): These cookies are strictly necessary for the proper functioning of our website. Without these cookies, the website cannot operate correctly, and certain services, such as logging in or accessing secure areas, may not be available; because they are essential for the website’s operation, they cannot be disabled.
Functional Cookies: These cookies enhance your browsing experience by enabling additional features and personalization, such as remembering your preferences and settings. While not strictly necessary for the website to function, they improve usability and convenience; these cookies are only placed if you provide your consent.
Analytics cookies: These cookies collect information about how visitors interact with our website, such as which pages are visited most often and how users navigate the site. This data helps us improve website performance, optimize content, and enhance the user experience; these cookies are only placed if you provide your consent. We use the following analytics cookies.
Matomo Cookies:
This website uses Matomo (formerly Piwik), an open source software which enables the statistical analysis of website visits. Matomo uses cookies (text files) which are saved on your computer and which allow us to analyze how you use our website. The website user information generated by the cookies will only be saved on the servers of our IT Department. We use this information to analyze www.eso.org visits and to prepare reports on website activities. These data will not be disclosed to third parties.
On behalf of ESO, Matomo will use this information for the purpose of evaluating your use of the website, compiling reports on website activity and providing other services relating to website activity and internet usage.
Matomo cookies settings:
Additional Third-party cookies on ESO websites: some of our pages display content from external providers, e.g. YouTube.
Such third-party services are outside of ESO control and may, at any time, change their terms of service, use of cookies, etc.
YouTube: Some videos on the ESO website are embedded from ESO’s official YouTube channel. We have enabled YouTube’s privacy-enhanced mode, meaning that no cookies are set unless the user actively clicks on the video to play it. Additionally, in this mode, YouTube does not store any personally identifiable cookie data for embedded video playbacks. For more details, please refer to YouTube’s embedding videos information page.
Cookies can also be classified based on the following elements.
Regarding the domain, there are:
- First-party cookies, set by the website you are currently visiting. They are stored by the same domain that you are browsing and are used to enhance your experience on that site;
- Third-party cookies, set by a domain other than the one you are currently visiting.
As for their duration, cookies can be:
- Browser-session cookies, which are deleted when the user closes the browser;
- Stored cookies, which stay on the user's device for a predetermined period of time.
How to manage cookies
Cookie settings: You can modify your cookie choices for the ESO webpages at any time by clicking on the link Cookie settings at the bottom of any page.
In your browser: If you wish to delete cookies or instruct your browser to delete or block cookies by default, please visit the help pages of your browser:
Please be aware that if you delete or decline cookies, certain functionalities of our website may be not be available and your browsing experience may be affected.
You can set most browsers to prevent any cookies being placed on your device, but you may then have to manually adjust some preferences every time you visit a site/page. And some services and functionalities may not work properly at all (e.g. profile logging-in, shop check out).
Updates to the ESO Cookies Policy
The ESO Cookies Policy may be subject to future updates, which will be made available on this page.
Additional information
For any queries related to cookies, please contact: pdprATesoDOTorg.
As ESO public webpages are managed by our Department of Communication, your questions will be dealt with the support of the said Department.