Projection type image display apparatus, and optical unit and polarization splitting unit each used for the apparatus
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United States of America Patent
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Jun 30, 2009
Grant Date -
Oct 26, 2006
app pub date -
Apr 20, 2006
filing date -
Apr 21, 2005
priority date (Note) -
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Abstract
A polarization splitting section has a structure in that a polarization splitting layer is formed of a light reflecting grid member which is arranged in a grid-shaped pattern on an optically-transparent substrate, and an optically-transparent medium is filled between the grid member and the substrate in contact with the grid member surface and the substrate surface, and the grid member and the filled optically-transparent medium are bonded to the substrate with another adhesive agent or tackiness agent formed of an optically-transparent medium interposed. The polarization splitting layer is partly protruded externally from the surfaces of prism materials.
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