Circadian rhythm optical film

Patent metadata

Field	Value
Publication number	US-9739916-B2
Application number	US-201414220193-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	Mar 20, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

An optical film includes a polymeric bandstop filter reflecting a band of blue light in a range from 440 nm to 480 nm a polymeric bandstop filter reflecting a band of blue light in a range from 440 nm to 480 nm and transmitting greater than 50% of blue light at a wavelength of 10 nm longer than a long wavelength band edge and at a wavelength of 10 nm shorter than a short wavelength band edge.

First claim

What is claimed is:

1. An optical film comprising:
a polymeric bandstop filter reflecting a band of blue light in a range from 440 nm to 480 nm and transmitting greater than 50% of blue light at a wavelength of 10 nm longer than a long wavelength band edge and at a wavelength of 10 nm shorter than a short wavelength band edge, wherein the polymeric bandstop filter comprises a polymeric multilayer optical film comprising a plurality of alternating layers of PET and co-PMMA cooperating to provide
a full width half maximum (FWHM) value in a range from 10 nm to 40 nm, and
a band floor having a transmission being less than 1% and a width of at least 50% of the FWHM value.

2. The optical film according to claim 1 , wherein the polymeric bandstop filter blocks a second band of light within a range from 560 to 600 nm and a full width half maximum value being less than 40 nm.

3. The optical film according to claim 1 , further comprising an adhesive layer disposed on a first major surface of the polymeric bandstop filter.

4. The optical film according to claim 1 , wherein the band of blue light is centered on 460 nm and having a band floor width of 5 nm to 25 nm.

5. The optical film according to claim 1 , wherein the polymeric bandstop filter transmits greater than 70% of blue light at a wavelength of 10 nm and longer than a long wavelength band edge and the polymeric bandstop filter transmits greater than 70% of blue light at a wavelength of 10 nm and shorter than a short wavelength band edge.

6. The optical film according to claim 1 , wherein the optical film is disposed in an eyewear article.

7. The optical film of claim 1 , the polymeric multilayer optical film having 275 alternating layers of a first polymeric material and a second polymeric material.

8. The optical film of claim 1 , the polymeric multilayer optical film having an f-ratio of approximately 0.5.

9. The optical film of claim 1 , the polymeric multilayer optical film having a third order harmonic reflecting a band of blue light in a range from 440 nm to 480 nm.

10. An optical display comprising:
a display panel emitting light;
an optical film disposed on the display panel, the optical film comprising:
a polymeric bandstop filter reflecting a band of blue light in a range from 440 nm to 480 nm and transmitting greater than 50% of blue light at a wavelength of 10 nm longer than a long wavelength band edge and at a wavelength of 10 nm shorter than a short wavelength band edge, wherein the polymeric bandstop filter comprises a polymeric multilayer optical film comprising a plurality of alternating layers of PET and co-PMMA cooperating to provide
a full width half maximum (FWHM) value in a range from 10 nm to 40 nm, and
a band floor having a transmission being less than 1% and a width of at least 50% of the FWHM value.

11. The optical display according to claim 10 , further comprising a yellow light absorbing material disposed on the optical film, wherein the optical film separates the yellow light absorbing material from the display panel.

12. The optical display according to claim 10 , wherein the polymeric bandstop filter blocks a second band of light within a range from 560 to 600 nm and a full width half maximum value being less than 40 nm.

13. The optical display according to claim 10 , further comprising an adhesive layer fixing the optical film to the display panel.

14. The optical display according to claim 10 , wherein the polymeric bandstop filter reflects a band of light centered on 460 nm and having a full width half maximum (FWHM) bandwidth of 25 nm or less.

15. The optical display according to claim 10 , wherein the polymeric bandstop filter transmits greater than 70% of blue light at a wavelength of 10 nm and longer than a long wavelength band edge and the polymeric bandstop filter transmits greater than 70% of blue light at a wavelength of 10 nm and shorter than a short wavelength band edge.

16. An optical display comprising:
a display panel emitting light;
a multilayer optical infrared reflecting polymeric film disposed on the display panel, the multilayer optical infrared reflecting polymeric film having a third order harmonic reflecting a band of blue light in a range from 440 nm to 480 nm and substantially transmitting blue light less than 430 nm and greater than 490 nm, wherein the multilayer optical infrared reflecting polymeric film comprises a plurality of alternating layers of PET and co-PMMA cooperating to provide
a full width half maximum (FWHM) value in a range from 10 nm to 40 nm, and
a band floor having a transmission being less than 2% and a width of at least 50% of the FWHM value.

17. The optical display according to claim 16 , wherein the multilayer optical infrared reflecting polymeric film blocks a second band of light within a range from 560 to 600 nm and having a full width half maximum (FWHM) bandwidth of 40 nm or less.

18. The optical display according to claim 16 , wherein the multilayer optical infrared reflecting polymeric film reflects a band of light centered on 460 nm and having a full width half maximum (FWHM) bandwidth of 25 nm or less.

Assignees

• 3M Innovative Properties Co

Inventors

• Weber Michael F
• Kahl Jonathan T
• Casner Glenn E

Classifications

• G02B5/282 Primary

  reflecting for infrared and transparent for visible light, e.g. heat reflectors, laser protection · CPC title

• G02C7/10

  Filters, e.g. for facilitating adaptation of the eyes to the dark; Sunglasses · CPC title

• G02B5/20

  Filters (polarising elements G02B5/30) · CPC title

• G02C7/108

  Colouring materials · CPC title

• G02C7/104

  having spectral characteristics for purposes other than sun-protection · CPC title