Machinist exploring career paths; optical components manufacturing?

I was expressing a desire to move up in the world of machining, into tighter tolerance, more expert work, and someone suggested I look into optical components manufacturing.

So, what can you tell me, a machinist, about what I might do in that field?

Anyone know of a manufacturer in northwest washington state or southern BC?

I had wanted to get into machine tool building (meta machining lol), but now I’m curious what other top-level fields I might look into.