Neutrino beam passes through optics lens, focus the neutrinos?

[Spinnor]

If a neutrino beam passes through an optics lens in principle does the matter in the lens focus the neutrino beam granted it may be ridiculously small amount? If the lens were instead made of compressed matter of nuclear densities would the answer change much?

Thanks for any help!

 

[SteamKing]

It's hard to say. Neutrinos can pass through the Earth without interacting with any matter whatsoever. Unless the size of your lens was, say, the size of the sun, I wouldn't count on observing any effect on the neutrino beam.

 

[mfb]

Ridiculously small amount: Yes.
Any application: No.

Matter effects on neutrino mixing are more notable.