| 摘要 |
PROBLEM TO BE SOLVED: To provide a beam splitter having polarization characteristics suppressed in variation. SOLUTION: Prism materials 1, 2 are joined across a joining material 3, a polarization film 4 and a matching film 5. The matching film 5 is formed of material having a refractive index smaller than that of the prism materials 1, 2 and larger than that of the joining material 3. COPYRIGHT: (C)2007,JPO&INPIT
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