Back to results
US 11,029,541 B2Granted
Optical article with blue cut, high UV cut and high clarity
AssigneeEssilor International
InventorsHao Wen Chiu, Aref Jallouli, Haifeng Shan
Life of this patent
Estimating the term…
Abstract
The combination of selective and high pass filters to cut harmful blue light allowed to achieve the best compromise between high blue cut performance, high UV cut and low yellow index, not achievable when using the filters alone.
Claims19
A transparent optical article with enhanced ultraviolet and blue light blocking ability comprising:
- a selective filter at least partially blocking blue light in a wavelength range chosen within the 400-460 nm range;
- and
- a high-pass filter having its maximum cut in the UV light wavelength range and partially blocking blue light in the 400-500 nm range;
- wherein the optical article blocks at least 66% of light with a wavelength less than or equal to about 410 nm, at each wavelength in the wavelength range 350-410 nm;
- wherein the selective filter is an absorbing dye that has an absorption peak centered at a wavelength chosen within the 410-440 nm wavelength range and exhibits a full width at half maximum lower than or equal to 40 nm.
2 more elements
A wafer for reducing through-transmittance of light with a wavelength less than or equal to about 410 nm to a substrate, comprising:
- a blend of a transparent polymer resin;
- a selective filter at least partially blocking blue light in a wavelength range chosen within the 400-460 nm range;
- and
- a high-pass filter having its maximum cut in the UV light wavelength range and partially blocking blue light in the 400-500 nm range;
- wherein the selective filter is an absorbing dye that has an absorption peak centered at a wavelength chosen within the 410-440 nm wavelength range and exhibits a full width at half maximum lower than or equal to 40 nm.
2 more elements
A process of enhancing the blue-cut performance of an optical element resin comprising:
- blending a transparent polymer resin with a selective filter at least partially blocking blue light in a wavelength range chosen within the 400-460 nm range and a high-pass filter having its maximum cut in the UV light wavelength range;
- and
- partially blocking blue light in the 400-500 nm range by a process selected from the group consisting of dry blending, melt mixing, and solvent mixing;
- wherein the selective filter is an absorbing dye that has an absorption peak centered at a wavelength chosen within the 410-440 nm wavelength range and exhibits a full width at half maximum lower than or equal to 40 nm.
1 more element
Dependencies are inferred from the claim text.