Lens blank having a temporary grip coating for a method for manufacturing spectacle lenses according to a prescription

US9529123B2 · kind B2 · utility

Assignee

• Satisloh AG · CH

Inventors

• Frank Breme · Simmerath, DE
• Michael Witzany · Aalen, DE
• Marc Peter · Zürich, CH
• Guiseppe Viscomi · Senago, IT
• Arturo Colautti · Milano, IT

Key dates

• Filing date: Jun 23, 2015
• Grant date: Dec 27, 2016
• Expiry date: Jun 28, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G02C2202/16
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A lens blank is proposed, having a first face, an opposite, second face, and an edge inbetween, the first face possessing a final curvature and being coated, in this order, with an antireflection coating, a top coating, and a temporary grip coating. The antireflection coating has a stack of alternating antireflection layers with an outermost layer, whereas the top coating is selected from a group including hydrophobic, oleophobic and dirt repelling coatings. The temporary grip coating and the outermost layer of the antireflection coating are made from one and the same coating material. In this way the temporary grip coating effectively serves to provide sufficient adhesion to the blocking material on the block piece in the processing steps, and can easily be removed from the processed lens upon deblocking without degrading the repelling properties of the top coating.