Patent · US Active

Variable transmittance optical filter and uses thereof

US8441707B2 · kind B2 · utility

25Cited by

10References

22Claims

0Family size

Assignee

SWITCH MATERIALS, INC. · CA

Inventors

Duhane Lam · Vancouver, CA
Neil Robin Branda · North Vancouver, CA
Andreea Spantulescu · New Westminster, CA

Key dates

Filing date	Jun 10, 2010
Grant date	May 14, 2013
Priority date	—
Expiry date	Oct 9, 2030

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.