First, stand very still in very bright light. 800 telescopes
aimed at your face and focus a small area of light from
each of the telescopes onto an adjacent thin
ribbon that expands or contracts depending on how much
light is hitting it. Each of the 800 ribbons will expand or
contract more
or less depending on how much light is
hitting them.
The ribbons are attached to a series of levers that
amplify
the
minute movements into something on the order of a half
inch or so. This movement is transferred over distance to
a
series of wheels arrayed in a grid forming pixels.
These wheel/pixels have dozens of faces on them
ranging
from white to black, shades of grey being between the
two
extremes. Depending on how much they are turned by
the
heated ribbon-to-thread amplification mechanism, they
turn a white, black or somewhere in between face to the
viewer forming a
picture.
So if a telescope is aimed at a bright portion of the face,
it will heat the ribbon enough to turn the wheel all the
way to the white portion. If a telescope is aimed at a
dark portion of the face, it will not heat the ribbon and
thus the wheel will remain in it's "dark side facing out"
position. If it's halfway between dark and light, the
wheel will turn halfway showing a matching grey face to
the viewer.
It would take a minute or two for the image to "cook"
but it should probably yield a recognizable image.