12 October 2004 Development of ultra-light-weight mirror with carbon/carbon composites for optical-IR astronomy
Author Affiliations +
Future large aperture telescope projects will require very lightweight mirrors that can be produced at significantly lower cost and faster production times than currently possible. Tailorable, low thermal expansion composite materials offer an attractive path to achieve these goals. Application of carbon/carbon composites is particularly attractive as these materials do not exhibit the moisture-absorption-related expansion problems observed in typical resin matrix composites. The National Astronomical Observatory of Japan and Mitsubishi Electric Corporation are collaborating to develop materials and surface finishing technologies to enable future carbon/carbon composite mirror applications. Material processing techniques for improved substrate surface finish have been developed. An innovative surface finish approach involving high precision machining of a metal layer applied to the mirror surface has also been developed. As a result, 150mm diameter C/C spherical mirror with honeycomb sandwich structure was successfully demonstrated.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hajime Takeya, Hajime Takeya, Masami Kume, Masami Kume, Steven Hahn, Steven Hahn, Tsuyoshi Ozaki, Tsuyoshi Ozaki, Naoki Kohara, Naoki Kohara, Masashi Otsubo, Masashi Otsubo, Saku Tsuneta, Saku Tsuneta, } "Development of ultra-light-weight mirror with carbon/carbon composites for optical-IR astronomy", Proc. SPIE 5487, Optical, Infrared, and Millimeter Space Telescopes, (12 October 2004); doi: 10.1117/12.552304; https://doi.org/10.1117/12.552304


Ultralightweight C-SiC composite mirrors
Proceedings of SPIE (November 04 2001)
Ultra lightweight composite mirrors for optical application
Proceedings of SPIE (October 12 1997)
Steps Towards Large Replicated Mirrors
Proceedings of SPIE (August 19 1986)
Optical quality of C/SiC composite for the SPICA telescope
Proceedings of SPIE (October 11 2004)

Back to Top