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James Webb Mirrors

James Webb Mirrors

Old Jan 10th 2022, 7:43 pm
  #1  
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Default James Webb Mirrors

I'm a simple guy and no doubt there are posters out there who know more about these things, but I have an itch and it won't go away.
The primary mirror of the James Webb telescope, now winging it's way into space, is constructed from 18 individual hexagonal mirrors.
Once in place each will need to be adjusted to focus light from distant objects precisely.
My itch is how the engineers at NASA will be able to adjust the focus of each independently of the other 17.
Is it simply a question of moving and distorting each in turn to see whether it improves the image or is there some more rational and obvious way of doing this.
Does anybody know?
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Old Jan 11th 2022, 3:35 pm
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Default Re: James Webb Mirrors

NASA does!
https://www.webb.nasa.gov/content/ob...ors/index.html
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Old Jan 12th 2022, 1:53 am
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Default Re: James Webb Mirrors

Originally Posted by wtkp0u View Post
Many thanks for that link.


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