申请人:ESSILOR INTERNATIONAL (COMPAGNIE GENERALE D'OPTIQUE)
公开号:US20160231636A1
公开(公告)日:2016-08-11
The present invention relates to an electrochromic composition comprising at least one reducing compound, at least one oxidizing compound which is selected from specific viologen derivatives, and at least one dye. Said composition can be used as a variable transmittance medium for the manufacture of an optical article, such as an ophthalmic lens.