[Brightcolours]

Could this be done on sensor level too? Too my understanding its the less orthogonal rays which are filtered. To my understanding digital sensors already do that a little but if there cold be a kind of gradient you could have the effect for every lens.

No, there is no way to do anything of the kind on sensor level.

Any point of the sensor receives the light from a multitude of directions through the optics, you can't choose what to get and not to get.

 

What you are proposing in your logic would just amount to heavy vignetting.