| http://www.w3.org/ns/prov#value | - FIG. 2a is a schematic diagram of showing a first step in the alignment of the optical components shown in FIG. 1b; FIG. 2b is a schematic diagram of showing another second step in the alignment of the optical components shown in FIG. 1b; FIG. 2c is a schematic diagram of showing yet another step in the alignment of the optical components shown in FIG. 1b; FIG. 3 is a schematic diagram of an appar
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