Patent · US Active

Variable transmittance optical filter and uses thereof

US9864252B2 · kind B2 · utility

3Cited by

15References

20Claims

0Family size

Assignee

SWITCH MATERIALS, INC. · CA

Inventors

Duhane Lam · Vancouver, CA
Neil Robin Branda · North Vancouver, CA

Key dates

Filing date	Nov 16, 2015
Grant date	Jan 9, 2018
Priority date	—
Expiry date	Nov 16, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/10
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Variable transmittance optical filters capable of transitioning from a light state to a dark state on exposure to UV radiation and from a dark state to a light state with application of an electric voltage are provided. The optical filters comprise a switching material that comprises one or more chromophores that have electrochromic and photochromic properties.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.