Lens blocking and deblocking method and related device

摘要

A method of deblocking a lens component (1) fixed on a thermoplastic block (2) of an ophthalmic lens block comprising the steps of: a) applying a pushing strain on the surface (14) of the lens component fixed on the thermoplastic block; b) providing a warm gas flow at the interface between the lens component (1) and the thermoplastic block; and maintaining the pushing strain during the step of providing the warm gas flow at the interface between the lens component and the thermoplastic block, wherein the stress applied to obtain the pushing strain of step a) is greater or equal to 0.1 MPa and/or less or equal to 1 Mpa, and wherein the temperature of the warm gas flow of step b) is greater or equal to 30° and/or less or equal to 70° C.

主权项

1. A method of deblocking a lens component fixed on a thermoplastic block of an ophthalmic lens block comprising the steps of:
(a) applying a pushing strain on the surface of the lens component fixed on the thermoplastic block; (b) providing a warm gas flow at the interface between the lens component and the thermoplastic block; and maintaining the pushing strain during the step of providing the warm gas flow at the interface between the lens component and the thermoplastic block, wherein the stress applied to obtain the pushing strain of step (a) is greater than or equal to 0.1 MPa and less than or equal to 1 MPa and wherein the temperature of the warm gas flow of step (b) is greater than or equal to 30° C. and less than or equal to 70° C.; wherein the pushing strain is perpendicular to the interface and the warm gas flow propagates parallel to the interface.