Patent ID: 6765661
Filing Date: 2004-07-20
Classification: G01M,G01N

Abstract:
A device for the automatic inspection of ophthalmic lenses, comprising: a light source providing an illuminating light to illuminate an ophthalmic lens to be inspected; a holding device for the ophthalmic lens, wherein the holding device is located in the path of the illuminating light so that the ophthalmic lens is observed in an observation beam consisting of a dark-field observation beam and a bright-field observation beam; a first imaging device located in to path of the dark field observation beam for taking a dark-field image of the ophthalmic lens on a dark-field; a second imaging device located in the path of a bright-field observation beam for taking a bright-field image of the ophthalmic lens on a bright field; and an image analysing equipment, wherein both the dark-field image and the bright-field images are taken simultaneously and then transmitted to to image analyzing equipment where they are processed and analyzed for defect evaluation of the ophthalmic lens.