| http://www.w3.org/ns/prov#value | - However, the polarizing beam splitter 41 adopted herein isassembled in the following manner.That is, the polarizing beam splitter 41 is of such a shape that as shown in FIG. 11, one vertex angle of one of the prism members constituting it, for example, the prism member A in this embodiment, is cut off or truncated (flattened) (at alocation whereat the vertex angles of the prism members concentrate
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