Cost-effective multispectral three-mirrors anastigmat sensor for high-performance surveillance applications using electroformed free-form mirrors

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

doi:10.1117/12.2017740

31 May 2013 Cost-effective multispectral three-mirrors anastigmat sensor for high-performance surveillance applications using electroformed free-form mirrors

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

Author Affiliations +

Proceedings Volume 8713, Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications X; 871307 (2013) https://doi.org/10.1117/12.2017740
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

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.

Citation Download Citation

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, and F. E. Zocchi "Cost-effective multispectral three-mirrors anastigmat sensor for high-performance surveillance applications using electroformed free-form mirrors", Proc. SPIE 8713, Airborne Intelligence, Surveillance, Reconnaissance (ISR) Systems and Applications X, 871307 (31 May 2013); https://doi.org/10.1117/12.2017740

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