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US 12,405,569 B2Granted
Color filter using holographic element
AssigneeNitto Denko Corporation
InventorsPeng Wang, Sergey Simavoryan, Isamu Kitahara, Sheng Li
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Abstract
Described herein are devices, compositions, and methods for improving color discernment. In particular, devices and methods for correcting color blindness comprising a hologram that enhances the ability to distinguish a desired first bandwidth by decreasing the transmission of a second bandwidth. Advantageously, the device appears not tinted to outside observer.
Claims13
A device for improving a person's ability to distinguish colors comprising:
- two flat holographic elements, wherein at least one of the holographic elements comprises an interference pattern comprising a plurality of ridges disposed in the surface of the holographic element;
- a positioning component, coupled to and separating the holographic elements, and configured to position at least one of the holographic elements to an active position with respect to an eye of a person;
- wherein an image, having light of a first visible color wavelength and light of a second visible color wavelength, and passing through at least one of the holographic elements is viewable by the eye when at least one of the holographic elements is in the active position;
- wherein at least one of the holographic elements diffracts light of the second visible color wavelength thereby reducing the relative brightness of light of the second visible color wavelength;
- and
- wherein the difference in relative brightness between the first visible color wavelength and the second visible color wavelength enhances the ability to distinguish colors in the image.
3 more elements
Dependencies are inferred from the claim text.