25 July 2008 Cold chopper system for mid-infrared instruments
Author Affiliations +
We have developed a cold chopper system for mid-infrared observations. This system is installed into the newly developing mid-infrared instrument, MAX38, for the University of Tokyo Atacama 1.0-m telescope. It is cooled to about 9K. The cold chopper mirror is controlled by a piezoelectric actuator with a flexure hinge lever, and enables square-wave chopping at a frequency up to 7.8 Hz. At the moment, the maximum throw of the chopper is 30 arcseconds on the sky. This cooled chopping mirror system can also be applied to the tip-tilt mirror for SPICA infrared space telescope. We carried out the first light with Kanata 1.5-m telescope at Higashi-Hiroshima Observatory (Hiroshima, Japan) in June 2007 and March 2008. In this observation, we demonstrated that the cold chopper could cancel out the atmospheric turbulence noise of a frequency of 5 Hz at 8.9 micron.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomohiko Nakamura, Tomohiko Nakamura, Takashi Miyata, Takashi Miyata, Shigeyuki Sako, Shigeyuki Sako, Takashi Onaka, Takashi Onaka, Keigo Enya, Keigo Enya, Hirokazu Kataza, Hirokazu Kataza, Hidenori Takahashi, Hidenori Takahashi, Yoshiyuki Obuchi, Yoshiyuki Obuchi, } "Cold chopper system for mid-infrared instruments", Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70184H (25 July 2008); doi: 10.1117/12.787762; https://doi.org/10.1117/12.787762


The 15 Meter National New Technology Telescope (NNTT) The...
Proceedings of SPIE (November 03 1983)
A new mid infrared camera for ground based 30 micron...
Proceedings of SPIE (July 09 2008)
Development of MIMIZUKU a mid infrared multi field imager...
Proceedings of SPIE (September 24 2012)
Active optics technology: an overview
Proceedings of SPIE (December 01 1991)
A Ten-Meter Optical Telescope In Space
Proceedings of SPIE (August 20 1986)

Back to Top