the problem of reverse engineering to create new telescopes is that we would have to first engineer the device to begin with. also i thought of something else. if you have the sheild and it can fool sensors would you not expect then that it would produce a certain amount of internal radiation? how safe would it really be to use it?

also most propulsion units we see in the main examples (Star Wars/Trek) produce their own light sources. wouldn't you still see them even if in a distorted way?

as for the shield that projects the opposite view that would be an effective version allowing you to see out and function assuming that you could solve the problem of 360 degree angular coverage. So effective but not necessarily feasible.

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