Optical instrument in order to identify and localize microengravings presented on an ophthalmic lens

摘要

It is an instrument including an optical collimating element (30) having a focal distance, a point light source (25 - 27) with a wavelength of between 700 and 1000 nm, a diameter less than or equal to the 50th of the focal distance and arranged to a first focus of the collimation device for the light beam (20) becomes a collimated light, a back-scattering device (12), a support in order to receive an ophthalmic lens (14), with said collimating element, the support and back-scattering device which are disposed so that the collimated light beam reaches the location (15) of the lens in which are present in the microengravings, a member of the processing of images (32) and a member for capturing images (31) connected to said processing unit and comprising a lens (35) disposed at a second focus of said collimating element, which is developed in order to provide the device for processing the images of the back-scattering device in order to identify and localize said microengravings.