glaring due to projector light

In Auditoriums, If the presenter stands in projector<->screen zone, Presenter won't be able to see audience due to projector (OHP) light.

Proposed Idea: we can have a polarization (vertical/horizontal) filter on projector and orthogonal (horizontal/vertical) glasses for presenter. so he does not see direct light from projector. he can see the audience without any glaring.

This makes the presenter not see the presentation on screen. solution would be to use polarization changing surface as projector screen. hence presenter can't see light from projector->screen, but can see reflected light from screen.

Alternate solutions for the given problem:

-> back projections

-> Short throw projector

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