Assertion: projector's mirror | /r/CapableOf | help direct much light
Facets:
value: through a painted glass picture slide
type: MANNER
value: through a lens
type: MANNER
Source sentences:
text: In its most common setup it had a concave mirror behind a light source to help direct as much light as possible through a painted glass picture slide and a lens, out of the lantern onto a screen.