Circadian rhythm optical film
US9739916B2 · kind B2 · utility
5Cited by
25References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2014 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Jul 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C7/108
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.