| http://www.w3.org/ns/prov#value | - Then, the large-diameter imaging convex lens L2, in the same manner as described above, causes the light from the object of observation 20 to be focused again inside the empty space in front thereof and offers a three-dimensional image formed of the three primary colors of light, i.e. red, blue, and green, for the spectator 40 seated on the front side of the empty space.
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