Thanks for that. They discuss inflatable mirrors. According to the refs,
they should work for infrared wavelengths but couldn't maintain sufficient
accuracy for optical wavelengths. They be tested though if they can form
large infrared mirrors. Is there a limit to their size? Could they be made
large enough to image extrasolar planets in the infrared?

Bob Clark

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Finally, nanotechnology can now fulfill its potential to revolutionize
21st-century technology, from the space elevator, to private, orbital
launchers, to 'flying cars'.
This crowdfunding campaign is to prove it:

Nanotech: from air to space.
https://www.indiegogo.com/projects/n...ce/x/13319568/
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"William Mook" wrote in message
...

http://www.techbriefs.com/component/...machinery/7062

http://citeseerx.ist.psu.edu/viewdoc...=rep1&type=pdf

https://www.google.com/url?sa=t&rct=...73rrKo2WfKxvxg