The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1985
Filed:
Oct. 15, 1982
Applicant:
Inventors:
Horst Ballmer, Heidenheim, DE;
Erwin Wiedmann, Essingen, DE;
Assignee:
Carl-Zeiss-Stiftung, Heidenheim/Brenz, Oberkochen, DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
250201 ; 350357 ;
Abstract
In order to regulate the absorptance of an electrochromic layer, the absorptance of the layer is measured optically. The signal derived therefrom is compared with a guide value and fed to a controller which has a dead zone between two hysteresis regions (at switch points), and charges are fed to or removed from the layer as required. Preferred fields of use are lenses, particularly eyeglass lenses, filters and dimmable mirrors to which an electrochromic layer is applied with provision for controlled change of its absorptance.