Polarization conversion element, polarization conversion unit, projection apparatus, and method for manufacturing polarization conversion element having a thin ultraviolet light curing adhesive layer
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United States of America Patent
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Oct 6, 2015
Grant Date -
Apr 5, 2012
app pub date -
Jul 15, 2011
filing date -
Oct 1, 2010
priority date (Note) -
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Abstract
A polarization conversion element is equipped with an element main body having a light incident surface and a light emission surface that are generally in parallel with each other, and a phase difference plate bonded to the light emission surface of the element main body. The element main body includes a plurality of light-transmissive substrates that are sequentially bonded at a predetermined angle with respect to the light emission surface, polarization separating films and reflection films that are alternately provided between the plurality of light-transmissive substrates, and adhesive layers formed between the plurality of light-transmissive substrates, respectively. The adhesive layers are each formed from ultraviolet light curing adhesive to a thickness between 5 μm and 10 μm.
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