Abstract: According to the invention, in order to visualize the ultraviolet radiation reflection power of a glasses lens (10), a face of said lens is exposed to an ultraviolet radiation in order to reflect a portion of said radiation. The portion of the reflected radiation then activates a developer surface (3) having a visual appearance that changes under the influence of the received ultraviolet radiation. The developer surface is watched in real time by an observer (100). Such a visualization is particularly quick, simple and demonstrative, and can be used in an optician's shop to help a client chose a glasses lens.
Type:
Grant
Filed:
October 16, 2007
Date of Patent:
February 19, 2013
Assignee:
Essilor International (compagnie Generale D'optiqe)
Abstract: A polishing tool (1) for finishing an ophthalmic lens includes a drive plate (4) which is equipped with elements (2) for mounting same to the spindle of a polishing machine; a removable polishing pad (5) designed to be rotated by the drive plate (4); positioning elements to block the radial movement of the pad (5) in relation to the plate (4) as well as to enable the pad (5) to slide axially in relation the plate (4); retaining elements which limit the axial sliding movement of the pad (5) in relation to the plate (4) to a pre-determined sliding range; and elements for stopping the rotational movement, having at least one tooth which can be engaged in a slot having a corresponding shape, one of the elements being provided on the plate (4) and the other on the pad (5).
Type:
Application
Filed:
September 1, 2005
Publication date:
April 24, 2008
Applicant:
Essilor international ( Compagnie Generale D'optiqe )