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Proceedings Paper

Cost-effective multispectral three-mirrors anastigmat sensor for high-performance surveillance applications using electroformed free-form mirrors
Author(s): M. Rossi; R. Banham; D. Blandino; G. Borghi; I. Ferrario; R. Formaro; W. Glage; N. Missaglia; S. Moretti; I. Neil; A. Ritucci; A. Sposito; V. Syvokin; G. Valsecchi; P. Zago; F. E. Zocchi
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Paper Abstract

A lightweight single-aperture and multi-spectral sensor operating from Visible to LWIR has been designed, manufactured and tested exploiting a Three Mirror Anastigmat (TMA) telescope featuring thin free-form mirrors electroformed from negative masters. Manufacturing complexity is in place only for the master realization, the contribution of which to the sensor cost decreases with the number of replicas. The TMA, suitable for airborne surveillance applications, has F/no. 1.4, focal length 136 mm and field of view 4.3° × 3.1°, and provides two channels, in the MWIR-LWIR and in the visible waveband. The nominal contrast is better than 75% in the visible at 25 cycles/mm. Electroformed 1 mm thick mirrors keep the sensor mass below 3 kg. Stray light and thermo-structural design has been done to comply with airborne conditions.

Paper Details

Date Published: 31 May 2013
PDF: 11 pages
Proc. SPIE 8713, Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications X, 871307 (31 May 2013);
Show Author Affiliations
M. Rossi, Media Lario Technologies (Italy)
R. Banham, Media Lario Technologies (Italy)
D. Blandino, Optec S.p.A. (Italy)
G. Borghi, Media Lario Technologies (Italy)
I. Ferrario, Media Lario Technologies (Italy)
R. Formaro, Agenzia Spaziale Italiana (Italy)
W. Glage, Raytheon ELCAN Optical Technologies (Canada)
N. Missaglia, Media Lario Technologies (Italy)
S. Moretti, Media Lario Technologies (Italy)
I. Neil, ScotOptix (Switzerland)
A. Ritucci, Media Lario Technologies (Italy)
A. Sposito, Agenzia Spaziale Italiana (Italy)
V. Syvokin, Raytheon ELCAN Optical Technologies (Canada)
G. Valsecchi, Media Lario Technologies (Italy)
P. Zago, Media Lario Technologies (Italy)
F. E. Zocchi, Media Lario Technologies (Italy)

Published in SPIE Proceedings Vol. 8713:
Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications X
Daniel J. Henry; Davis A. Lange; Dale Linne von Berg; S. Danny Rajan; Thomas J. Walls; Darrell L. Young, Editor(s)

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