Cold-shaping of thin glass foils as novel method for mirrors processing. From the basic concepts to mass production of mirrors

Дата и время публикации : 2012-11-15T11:28:28Z

Авторы публикации и институты :
Rodolfo Canestrari
Giovanni Pareschi
Giancarlo Parodi
Francesco Martelli
Nadia Missaglia
Robert Banham

Ссылка на журнал-издание: Optical Engineering, Vol 52, No 5, May 2013, Special edition on Optical Materials
Коментарии к cтатье: 19 pages, 11 figures
Первичная категория: astro-ph.IM

Все категории : astro-ph.IM

Краткий обзор статьи: We present a method for the production of segmented optics. It is a novel processing developed at INAF-Osservatorio Astronomico di Brera (INAF-OAB) employing commercial of-the-shelf materials. It is based on the shaping of thin glass foils by means of forced bending, this occurring at room temperature (cold-shaping). The glass is then assembled into a sandwich structure for retaining the imposed shape. The principal mechanical features of the mirrors are the very low weight, rigidity and environmental robustness. The cost and production time also turns to be very competitive. In this paper we sum up the results achieved during the r&d performed in the past years. We have investigated the theoretical limits of the structural components by means of parametric finite elements analyses; we also discuss the effects caused by the most common structural loads. Finally, the process implementation, the more significant validation tests and the mass production at the industry is described.

Category: Physics