Electrochromic element, optical filter, lens unit, imaging apparatus, and window member
US10444588B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2016 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Aug 26, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2001/1635
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an electrochromic element, including: a pair of electrodes; and an electrochromic layer disposed between the pair of electrodes and containing a plurality of kinds of organic electrochromic compounds, in which: at least one kind of the plurality of kinds of organic electrochromic compounds includes an organic electrochromic compound having an absorption peak in a wavelength region of 700 nm or more during coloring thereof; and when an optical density in a decolored state thereof is defined as 0, a fluctuation ratio of a transmittance in a wavelength region of from 650 nm or more to 700 nm or less with respect to a central transmittance is within ±15% at an optical density of 0.3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.