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Electrochromic element, optical filter, lens unit, and image pick-up apparatus

  • US 10,303,033 B2
  • Filed: 02/14/2017
  • Issued: 05/28/2019
  • Est. Priority Date: 02/17/2016
  • Status: Active Grant
First Claim
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1. An electrochromic element comprising:

  • a first electrode;

    a second electrode; and

    a third electrode, wherein;

    at least one of the first electrode and the second electrode is a transparent electrode, and an electrolyte, an anodic organic electrochromic compound, and a cathodic redox substance are present between the first electrode and the second electrode,the third electrode is electrically connectable to the first electrode or the second electrode via the electrolyte,the third electrode contains an irreversible oxidation substance, andan oxidation potential C of the irreversible oxidation substance is between an oxidation potential A of a reversible first oxidation reaction of the anodic organic electrochromic compound and an oxidation potential B of an irreversible oxidation reaction of the anodic organic electrochromic compound.

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