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. 25, 2023
Filed:
Nov. 10, 2020
Adlens Ltd, Eynsham, GB;
Robert Edward Stevens, Woodstock, GB;
Thomas Jacoby, Woodstock, GB;
Derek Paul Forbes Bean, Northants, GB;
William Guest, Oxford, GB;
Jon Nisper, Grand Rapids, MI (US);
Tom Worsley, Chipping Norton, GB;
Ashutosh Kumar, Hertfordshire, GB;
Richard Wilhelm Janse Van Rensburg, Hertfordshire, GB;
Peter Lee Crossley, Hertfordshire, GB;
Rita Stella, Hertfordshire, GB;
ADLENS LTD, Eynsham, GB;
Abstract
A method of assembling an adjustable fluid-filled lens assembly comprising biaxially tensioning an elastomeric membrane to a surface tension of greater than 180 N/m, typically greater than 1000 N/m; thermally conditioning the tensioned membrane, e.g., for one hour at a temperature of about 80° C., to accelerate relaxation of the membrane; mounting the membrane to a peripheral support structure whilst maintaining the tension in the membrane; assembling the mounted membrane with one or more other components to form an enclosure with the membrane forming one wall of the enclosure; and thereafter filling the enclosure with a fluid. The membrane may be formed from an aromatic polyurethane, and the fluid may be a phenylated siloxane. In some embodiments, the membrane is able to hold a substantially constant surface tension of at least 180 N/m for a period of at least 12 months.