US Patent Application 18249426. ULTRAVIOLET-STABLE OPTICAL FILMS simplified abstract
Contents
ULTRAVIOLET-STABLE OPTICAL FILMS
Organization Name
3M INNOVATIVE PROPERTIES COMPANY
Inventor(s)
Matthew B. Johnson of Woodbury MN (US)
Adam D. Haag of Woodbury MN (US)
ULTRAVIOLET-STABLE OPTICAL FILMS - A simplified explanation of the abstract
This abstract first appeared for US patent application 18249426 titled 'ULTRAVIOLET-STABLE OPTICAL FILMS
Simplified Explanation
The patent application describes an optical stack consisting of multiple layers of polymeric films that can manipulate the reflectance and absorption of incident light based on its wavelength and polarization state.
- The optical stack includes a first optical film with multiple layers and a second optical film with multiple layers.
- The first polymeric layers on the first optical film have a reflection band edge that separates a shorter wavelength range with higher reflectance and a longer wavelength range with lower reflectance.
- The second polymeric layers on the second optical film reflect less than 70% of the incident light for at least one wavelength in the shorter wavelength range.
- The second polymeric layers reflect more than 80% of the incident light for at least one wavelength in the longer wavelength range.
- Both the first and second polymeric layers absorb a certain percentage (A%) of the incident light in the shorter wavelength range, where A is equal to or greater than 50.
Original Abstract Submitted
An optical stack includes a first optical film with a plurality of first polymeric layers disposed on a second optical film with a plurality of second polymeric layers, such that for an incident light and for a first polarization state: a reflectance of the plurality of first polymeric layers versus wavelength has a reflection band edge separating a shorter wavelength range with higher reflectance a longer wavelength range with lower reflectance; for at least a first wavelength in the shorter wavelength range, the plurality of second polymeric layers reflects less than about 70% of the incident light, and for at least a second wavelength in the longer wavelength range, the plurality of second polymeric layers reflects greater than about 80% of the incident light; and in the shorter wavelength range, the pluralities of first and second polymeric layers absorbs respective A% and A% of the incident light, AA≥50.
