Polarization element unit and polarization light emitting apparatus
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United States of America Patent
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Dec 9, 2008
Grant Date -
May 4, 2006
app pub date -
Oct 27, 2005
filing date -
Oct 28, 2004
priority date (Note) -
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Abstract
In the present wire grid polarization element unit and polarized light emitting apparatus, it is possible to prevent non-polarized light, which has bad extinction ratio from leaking from end portions of polarization elements. Specifically, in a frame, wire grid polarization elements are aligned and light shielding members are provided on end portions of the polarization elements. In addition, without the shielding members, the wire grid polarization elements may be overlapped each other. Further, a rotation unit may be provided in order to rotate the polarization elements with respect to an optical axis of light so that a direction of grid of each polarization element can be parallel to each other.
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