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faitdivers / pyao

PyAO - Adaptive Optics simulation package
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Open Loop Simulation questions #20

Closed forcaeluz closed 10 years ago

forcaeluz commented 10 years ago

As a continuation of the discussion in #6 I have some questions regarding the open-loop simulation:

  1. Would it be nice to have a time element in the open-loop simulation as well? (That we run the simulation multiple times in a loop with changing incoming wafe-fronts?)
  2. If the loop is not closed, the mirror is not actuated. What is the use of the DM in the simulation then?
faitdivers commented 10 years ago
  1. Yes it would. It will be very useful to test things for several phase aberrations (Zernike, Kolmogorov, von Kármán,...) with different strengths.
  2. It's useful to quantify the quality of the model of the DM. We will be able to quantify the error between the reconstructed/estimated phase and the phase that the actual DM produces.

Basically, assessing the result of doing:

norm(wfRec - wfDM,2)
forcaeluz commented 10 years ago

That would be a static mirror then right? (Let's say, we deform it once, but we do not actuate it anymore, as there is no feed-back to the mirror).

faitdivers commented 10 years ago

Correct. Static mirror was what I had in mind.

Notice that it could also work for a dynamic scenario. Imagine that, once you actuate the mirror at a certain time step 'k' (and only at that time step; the input sequence would only have a Dirac delta at time step 'k'), the mirror takes some time to get to its steady-state position. That analysis can also be made in open-loop and is incredibly relevant.

forcaeluz commented 10 years ago

Thanks. I will keep this in mind. I will close this issue, and when we are so far that we can add such a feature into the simulation, we can create an new issue for it.