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Kobayashi
Carpal Tunnel
Reged: 07/10/08
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Re: No James Webb, No TPF, what's the point?
[Re: FeynmanFan]
#4957649 - 12/09/11 12:05 AM
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Neither has been demonstrated because, as far as I know, no one has tried.
Right. So someone should try it before approving a multi-billion dollar project that hinges on this technology.
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Shadowalker
Apocaloptimist
Reged: 11/23/04
Loc: Bay Saint Louis, Mississippi, ...
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Re: No James Webb, No TPF, what's the point?
[Re: Kobayashi]
#4957970 - 12/09/11 09:44 AM
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Neither has been demonstrated because, as far as I know, no one has tried.
Right. So someone should try it before approving a multi-billion dollar project that hinges on this technology.
A very sensible approach.
So the platform alignment and stability needs to be on the order of the wavelength of light. A challenging problem indeed.
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Kobayashi
Carpal Tunnel
Reged: 07/10/08
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Re: No James Webb, No TPF, what's the point?
[Re: Shadowalker]
#4958021 - 12/09/11 10:35 AM
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So the platform alignment and stability needs to be on the order of the wavelength of light. A challenging problem indeed.
I think it just needs to be stable enough that residual misalignment can be compensated using active optics. But that's still a big challenge.
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dickbill
professor emeritus
Reged: 09/30/08
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Re: No James Webb, No TPF, what's the point?
[Re: Kobayashi]
#4958033 - 12/09/11 10:44 AM
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The iss is big, it could be used as a support structure for a small interferometer telescope demo. Vibrations and other problems are within engineering capabilities and it is directly serviceable by humans, so even if this is not as good as a true hypertelescope in a Lagrange point, with probably many other inconvenients, it would be something.
Here is a link to the VLT interferometer
http://www.eso.org/sci/facilities/paranal/telescopes/vlti/index.html
http://www.eso.org/public/news/eso0706/
Ok it's in IR and the optical trains are massive, probably to heavy to be installed on an ISS structure. But in space, a miniaturised version with 'small' 14 inches telescopes would beat any terrestrial interferometer in the visible wavelenght.
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