Method of bonding a film to a curved substrate

A film and substrate technology, applied in the field of equipment to realize this method, can solve the problem of the entry of fine dust and dirt

Active Publication Date: 2009-06-24
ESSILOR INT CIE GEN DOPTIQUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Finally, during the preforming process, there may be dust or dirt entering the film through the liner

Method used

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  • Method of bonding a film to a curved substrate
  • Method of bonding a film to a curved substrate
  • Method of bonding a film to a curved substrate

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Embodiment Construction

[0033] In order to make these drawings more clear, the size of the components shown in the drawings is not according to the actual size or not in proportion to the actual size. In addition, the same symbols in different drawings indicate the same elements, for example, N that appears repeatedly in multiple drawings indicates a fixed direction.

[0034] according to figure 1 As shown, the substrate 1 consists of an ophthalmic lens. These lenses may be spectacle lens blanks, that is, lenses that have not been cut to the size of the frame for the purpose of fitting the lens into the frame. The lens 1 may consist of any material commonly used in the ophthalmic field, which may be a mineral material, an organic material, or may be a composite. It may be, for example, a corrective or non-corrective lens of a monofocal, bifocal, trifocal or modified type. Optionally, such lenses may be bulk-tinted. It will be appreciated that the invention is independent of the type of lens used....

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Abstract

A method of bonding a film (2) to a curved substrate (1) comprises preforming the film by applying a pneumatic pressure difference between two sides of the film and by heating said film. An intermediate shape is then conferred on the film, which is suitable for applying the film against a curved face of the substrate. This application is carried out, on the one hand, by keeping the film m the intermediate shape by means of an adjusted pressure difference applied between the two sides of the film and, on the other hand, by pressing the substrate against the film by means of a movable support (12-14). Such a method is used to obtain a defect-free ophthalmic lens with a film bonded to it.

Description

technical field [0001] The invention relates to a method of bonding a thin film to a substrate with a curved surface. The invention also relates to a device for implementing the method. Background technique [0002] Adhesion of films to curved surfaces of optical or spectacle lenses is useful for imparting some desired properties to these lenses. For example, such a film may be a polarizing film, a contrast enhancing film, or a photochromic film, among others. If the surface of the lens is curved and the original film surface is planar, it is not possible to apply the film directly to the lens. This is due to the different curvatures of the film and lens surfaces, which can lead to delamination, tearing and / or puckering. Therefore, it is necessary to preform the film to form a suitable initial curvature before applying the film to the lens. [0003] Usually, the film is preformed by thermal processing, by pressing a liner on one surface of the film, the surface of the fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C63/00B29C51/10B29C51/16B29D11/00
CPCB29C2791/006B29D11/00903B29C51/14B29C51/08B29C63/0073B29K2079/08B29K2067/00B29C51/10B29K2069/00B29C2791/007B29L2011/0016B29C43/02B29C65/02B29C65/48Y10T156/1028Y10T156/1031
Inventor 保罗·勒菲拉斯特安托万·马蒂
Owner ESSILOR INT CIE GEN DOPTIQUE
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