OPTICAL MATERIAL

An optical material satisfies the following (1) to (3) by a transmittance curve in a case in which the optical material is measured at a thickness of 2 mm, and has a* of from −4 to 1 and b* of from −1 to 11 as a hue in a CIE 1976 (L*, a*, b*) color space: (1) the transmittance curve has a maximum va...

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Bibliographische Detailangaben
Hauptverfasser:	KAWATO, Nobuo, TAKENAKA, Manami
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON CONTACT LENSES DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PHYSICS POLISHES SPECTACLES SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	An optical material satisfies the following (1) to (3) by a transmittance curve in a case in which the optical material is measured at a thickness of 2 mm, and has a* of from −4 to 1 and b* of from −1 to 11 as a hue in a CIE 1976 (L, a, b*) color space: (1) the transmittance curve has a maximum value T1 of transmittance at a wavelength of from 400 nm to 445 nm of 65% or more; (2) the transmittance curve has a minimum value T2 of transmittance at a wavelength of from 445 nm to 485 nm of 60% to 90%; and (3) a minimum value of transmittance at a wavelength of from 650 nm to 800 nm is 75% or more, and an average value of transmittance at a wavelength of from 650 nm to 800 nm is 80% or more.