Invention Grant
- Patent Title: Method and system for producing a gradient polar film
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Application No.: US17416899Application Date: 2019-12-09
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Publication No.: US12115744B2Publication Date: 2024-10-15
- Inventor: Zbigniew Tokarski , Eric Begg , Srinivasan Balasubramanian , Hao-Wen Chiu
- Applicant: ESSILOR INTERNATIONAL
- Applicant Address: FR Charenton-le-Pont
- Assignee: Essilor International
- Current Assignee: Essilor International
- Current Assignee Address: FR Charenton-le-pont
- Agency: NIXON & VANDERHYE
- Priority: EP 306819 2018.12.21
- International Application: PCT/EP2019/084257 2019.12.09
- International Announcement: WO2020/126622A 2020.06.25
- Date entered country: 2021-06-21
- Main IPC: B29D11/00
- IPC: B29D11/00 ; G02C7/12

Abstract:
A system and method for manufacturing an ophthalmic lens is provided. The method involves preparing a cross-polarization cancelling optical film for an optical article comprising providing a film having at least a first section comprising a first edge, a second section comprising a second edge, and a predetermined color intensity; providing an apparatus, wherein the apparatus comprises at least a first roller and a second roller, wherein the first roller and the second roller are configured to stretch at least a portion of the film; and continuously and asymmetrically stretching at least a portion of the film using the apparatus, while substantially maintaining the color intensity of the film.
Public/Granted literature
- US20220055327A1 METHOD AND SYSTEM FOR PRODUCING A GRADIENT POLAR FILM Public/Granted day:2022-02-24
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