Optical lens e.g. ophthalmic lens, gripping ring for optical lens treatment, has hoop including two draining mouths at its respective ends, and longitudinal ridge endings forming circular arcs to canalize coating material flow

摘要

The ring has a hoop (1) that has an opening through which the ring is clipped on an optical lens on which a coating is to be deposited. The hoop forms an arc of more than 180 degrees, and has two draining mouths (10) at its respective ends. The hoop has an inner face (2) connected with an edge of the optical lens, and longitudinal ridge endings (3, 4, 5) forming circular arcs to canalize flow of coating material.