Eyewear with chroma enhancement
Some embodiments provide a lens including a lens body and an optical filter configured to attenuate visible light in certain spectral bands. At least some of the spectral bands can include spectral features that tend to substantially increase the colorfulness, clarity, and/or vividness of a scene. In certain embodiments, eyewear incorporates an optical filter that enhances chroma within one or more spectral hands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.
1. An eyewear comprising an optical filter configured to transmit visible light in one or more spectral bands, the one or more spectral bands comprising a transmittance valley having a minimum transmittance with a spectral bandwidth, and a transmittance peak having a maximum transmittance, wherein:
the minimum transmittance of the transmittance valley is positioned at a first wavelength from about 470 nm to about 510 nm;
the maximum transmittance of the transmittance peak is positioned at a second wavelength ranging from about 410 nm to the first wavelength;
the maximum transmittance of the transmittance peak is from about 1% to about 30%; and
the spectral bandwidth, equal to the full width of the transmittance valley at the minimum transmittance plus 2.5% transmittance is less than or equal to 40 nm.
2. The eyewear of claim 1 , wherein the first wavelength ranges from about 480 nm to about 505 nm.
3. The eyewear of claim 2 , wherein the second wavelength ranges from about 410 nm to about 480 nm.
4. The eyewear of claim 1 , wherein the minimum transmittance of the transmittance valley is from about 15% to about 25%.
5. The eyewear of claim 1 , wherein the maximum transmittance of the transmittance peak is from about 1% to about 20%.
6. An eyewear comprising an optical filter configured to transmit visible light in one or more spectral bands, the one or more spectral bands comprising a transmittance valley having a minimum transmittance with a spectral bandwidth, and a transmittance peak having a maximum transmittance, wherein:
the minimum transmittance of the transmittance valley is positioned at a first wavelength from about 470 nm to about 510 nm;
the maximum transmittance of the transmittance peak is positioned at a second wavelength ranging from about 410 nm to the first wavelength;
the maximum transmittance of the transmittance peak is from about 10% to about 30%; and
the spectral bandwidth, equal to the full width of the transmittance valley at the minimum transmittance plus 5% transmittance is less than or equal to 60 nm, wherein the one or more spectral bands further comprise an other transmittance peak having a maximum transmittance positioned at a third wavelength ranging from the first wavelength to about 530 nm, wherein the maximum transmittance of the other transmittance peak is from about 10% to about 30%.
7. An eyewear comprising an optical filter configured to transmit visible light in one or more spectral bands, the one or more spectral bands comprising a transmittance valley having a minimum transmittance with a spectral bandwidth, and a transmittance peak having a maximum transmittance, wherein:
the minimum transmittance of the transmittance valley is positioned at a first wavelength from about 470 nm to about 510 nm;
the maximum transmittance of the transmittance peak is positioned at a second wavelength ranging from about 410 nm to the first wavelength;
the maximum transmittance of the transmittance peak is from about 10% to about 30%; and
the spectral bandwidth, equal to the full width of the transmittance valley at the minimum transmittance plus 5% transmittance is less than or equal to 60 nm, wherein the optical filter is configured to increase an average chroma value of uniform intensity light stimuli having a bandwidth of 30 nm transmitted through the optical filter at least partially within a spectral range from about 470 nm to about 510 nm as compared to a neutral filter that uniformly attenuates the same average percentage of light as the optical filter within the spectral range.
8. The eyewear of claim 1 , wherein the optical filter comprises a lens body and an optical interference stack disposed over the lens body.
9. The eyewear of claim 1 , wherein the optical filter comprises one or more organic dyes.
10. The eyewear of claim 1 , wherein the optical filter comprises one or more rare earth oxides.
11. An eyewear comprising an optical filter configured to transmit visible light in one or more spectral bands, the one or more spectral bands comprising:
a transmittance peak having a maximum transmittance, lower and upper edge portions having transmittances that are substantially below the maximum transmittance, and a middle portion including the maximum transmittance and a region substantially near the maximum transmittance, wherein the middle portion of the transmittance peak is positioned between the lower and the upper edge portions of the transmittance peak; and
a transmittance valley having a minimum transmittance, a spectral bandwidth associated with the minimum transmittance, lower and upper edge portions having transmittances that are substantially above the minimum transmittance, and a middle portion including the minimum transmittance and a region substantially near the minimum transmittance, wherein the middle portion of the transmittance valley is positioned between the lower and the upper edge portions of the transmittance valley, wherein:
the transmittance valley is positioned within the upper edge portion associated with the transmittance peak;
the minimum transmittance of the transmittance valley is positioned at a first wavelength ranging from about 560 nm to about 600 nm;
the maximum transmittance of the transmittance peak is positioned at a second wavelength ranging from about 510 nm to about 575 nm, wherein the second wavelength is less than the first wavelength;
the maximum transmittance of the transmittance peak is from about 10% to about 30%; and
the spectral bandwidth, equal to the full width of the transmittance valley at the minimum transmittance plus 5% transmittance, is less than or equal to 60 nm.
12. The eyewear of claim 11 , wherein the maximum transmittance of the transmittance peak is from about 10% to about 25%.
13. The eyewear of claim 11 , wherein the maximum transmittance of the transmittance peak is positioned from about 510 nm to about 545 nm.
14. The eyewear of claim 11 , wherein the optical filter further comprises an other transmittance valley having an other minimum transmittance, an other lower and an other upper edge portions that are substantially above the other minimum transmittance, and an other middle portion including the other minimum transmittance and an other region substantially near the other minimum transmittance, wherein the other middle portion associated with the other transmittance valley is positioned between the other lower and the other upper edge portions associated with the other transmittance valley, wherein:
the other minimum transmittance of the other transmittance valley is from about 1% to about 20%; and
the other transmittance valley is positioned in a third wavelength from about 470 nm to about 510 nm.
15. The eyewear of claim 11 , wherein the minimum transmittance of the transmittance valley is from about 1% to about 15%.
16. The eyewear of claim 11 , wherein the optical filter further comprises an other transmittance valley having an other minimum transmittance, an other lower and an other upper edge portions that are substantially above the other minimum transmittance, and another middle portion including the other minimum transmittance and an other region substantially near the other minimum transmittance, wherein the other middle portion associated with the other transmittance valley is positioned between the other lower and the other upper edge portions associated with the other transmittance valley, wherein:
the other transmittance valley is positioned within the upper edge portion associated with the transmittance peak; and
the other transmittance valley is positioned in a third wavelength from about 620 nm to about 680 nm.
17. Eyewear comprising an optical filter configured to increase a chroma value of uniform intensity light stimuli having a bandwidth of 30 nm transmitted through the optical filter within one or more chroma enhancement windows when comparing to a neutral filter that uniformly attenuates the same average percentage of light within the bandwidth of the light stimulus, each of the one or more chroma enhancement windows comprising a transmittance valley having a minimum transmittance, lower and upper edge portions having transmittances that are substantially above the minimum transmittance, and a middle portion including the minimum transmittance and a region substantially near the minimum transmittance, wherein the middle portion of the transmittance valley is positioned between the lower and the upper edge portions of the transmittance valley, wherein:
the optical filter comprises a first chroma enhancement window and a first transmittance valley within the first chroma enhancement window;
the minimum transmittance of the first transmittance valley is positioned at a first wavelength ranging from about 560 nm to about 600 nm;
transmittances of the lower and upper edge portions of the first transmittance valley are from about 10% to about 30%; and
a spectral width of the first chroma enhancement window is less than about 50 nm.
18. The eyewear of claim 17 , wherein the optical filter is configured to transmit visible light with a transmittance profile in a spectral range from about 460 nm to about 700 nm, wherein a maximum transmittance in the transmittance profile is from about 0% to about 30%.
19. The eyewear of claim 17 , wherein the optical filter further comprises a second chroma enhancement window and a second transmittance valley within the second chroma enhancement window, wherein:
the minimum transmittance of the second transmittance valley is positioned at a first wavelength ranging from about 460 nm to about 510 nm;
transmittances of the lower and upper edge portions of the second transmittance valley are from about 10% to about 30%; and
a spectral width of the first chroma enhancement window is less than about 50 nm.
20. The eyewear of claim 17 , wherein the optical filter further comprises a second chroma enhancement window and a second transmittance valley within the second chroma enhancement window, wherein:
the minimum transmittance of the second transmittance valley is positioned at a first wavelength ranging from about 610 nm to about 720 nm;
transmittances of the lower and upper edge portions of the second transmittance valley are from about 10% to about 30%; and
a spectral width of the first chroma enhancement window is less than about 50 nm.