| http://www.w3.org/ns/prov#value | - The cumulative effect of using layers 10, 100, 110, 120, 130, and 140, assuming that the individual birefringent elements of layers 110 and 130 are switched in the manner described in U.S. Pat. No. 5,822,117 and PCT Publication WO97/26577, and above, is an autostereoscopic system without the movement-permissive system, but which incorporates an electronic head-tracking system as herein described.
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