Optical material and use thereof
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United States of America Patent
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Jan 2, 2018
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app pub date -
Sep 10, 2014
filing date -
Sep 10, 2013
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Abstract
An optical material of the present invention has the following characteristics (1) to (4) in a transmittance curve which is measured at a thickness of 2 mm of the optical material.
- (1) the transmittance curve has a maximum transmittance value at 400 nm to 440 nm and the maximum transmittance thereof is 50% or more.(2) the transmittance curve has a minimum transmittance value at 471 nm to 500 nm.(3) The transmittance at 540 nm is 60% or more.(4) The minimum transmittance value at 471 nm to 500 nm is seven-tenths or less of the maximum transmittance at 400 nm to 440 nm and is seven-tenths or less of the transmittance at 540 nm.
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