Method for manually centering an ophthalmic lens in a centering/blocking device and associated centering/blocking device

摘要

Method of manually centering an ophthalmic lens, includes: a) acquiring and storing the shadow of a predetermined geometrical figure formed on a transparent support interposed between lighting and acquisition elements while the support is illuminated; b) superposing the lens and support; c) acquiring and storing the detected by the lens while the latter and support are illuminated; d) using the acquisition elements to acquire the shadow of the center and/or axis marking of the lens; e) displaying firstly the shadow of the center and/or axis marking, and secondly a virtual centering target corresponding to the position desired for the center marking relative to a reference point of the rim of the frame; f) deducing a corrected relative position for the reference point of the frame rim relative to the center marking, or vice versa; and g) putting the shadow of the centering marking of the lens manually into coincidence with the centering virtual target.