Is it possible to polarize a complex 3d shape?

[kolleamm]

I have this idea for LED eyes. Basically its an LED screen behind a half spherical shape. I want the user only to see what's on the display if they are looking directly at it. So for that I would need to polarize the half sphere. The half sphere can be made out of anything, the problem is how do I polarize it?

 

[DaveC426913]

I cannot get my head around what you are describing.

You have a flat LED screen. Small? 4x3 inches?
You place a hemisphere between the screen and the viewer. Pointing which way? How big?What does it accomplish?
You want to polarize the light? Why?

Would the same thing not be accomplished if the LEDs were instead at the bottom of small tubes? Then you could only see lights for which you are looking directly down the tubes.

Or am I misunderstanding the intent?