US 12,405,569 B2
Color filter using holographic element
Peng Wang, San Diego, CA (US); Sergey Simavoryan, San Diego, CA (US); Isamu Kitahara, San Diego, CA (US); and Sheng Li, San Diego, CA (US)
Assigned to Nitto Denko Corporation, Osaka (JP)
Appl. No. 15/323,059
Filed by NITTO DENKO CORPORATION, Osaka (JP); Peng Wang, San Diego, CA (US); Sergey Simavoryan, San Diego, CA (US); Isamu Kitahara, San Diego, CA (US); and Sheng Li, San Diego, CA (US)
PCT Filed Jun. 25, 2015, PCT No. PCT/US2015/037804
§ 371(c)(1), (2) Date Dec. 29, 2016,
PCT Pub. No. WO2015/200705, PCT Pub. Date Dec. 30, 2015.
Claims priority of provisional application 62/017,102, filed on Jun. 25, 2014.
Prior Publication US 2017/0160700 A1, Jun. 8, 2017
Int. Cl. G03H 1/00 (2006.01); G02B 5/20 (2006.01); G02C 7/10 (2006.01); G03H 1/04 (2006.01); G03H 1/18 (2006.01); G03H 1/26 (2006.01)
CPC G03H 1/0005 (2013.01) [G02B 5/203 (2013.01); G02C 7/104 (2013.01); G03H 1/0402 (2013.01); G03H 1/0408 (2013.01); G03H 2001/0439 (2013.01); G03H 2001/0441 (2013.01); G03H 2001/186 (2013.01); G03H 1/26 (2013.01); G03H 2227/02 (2013.01); G03H 2270/55 (2013.01)] 13 Claims
OG exemplary drawing
 
1. 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.