Transmission type optical element, lighting arrangement, and method for manufacturing
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United States of America Patent
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Nov 25, 2014
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app pub date -
Jul 1, 2010
filing date -
Jul 1, 2010
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Abstract
A transmission type optical element (10) comprises a surface relief micro-grating (5, 9) for guiding light (13) propagating through the optical element. According to the present invention, at least a portion (5) of the thickness of the optical element (10) is formed of a colored material (4) so as to make the optical element colored.
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