| http://www.w3.org/ns/prov#value | - The device of claim 4, wherein the integer of the ratio of the first optically active area to the second optically active area is 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 31, 63, 127, 255, or 2n???1 where n is an integer greater than or equal to 2.
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