METHOD FOR THE DETERMINATION OF RESIDUAL MOISTURE ON AND/OR WITHIN A LENS FORMING SURFACE

• Main Authors: HEIDRICH, Halina, TONN, Thomas
• Format: Patent
• Language: English; French; German
• Published: 24.10.2018
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TESTING; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

A method for determining residual moisture on and/or within a lens forming surface (31) of a mold half (3) comprises the steps of carrying out an infrared inspection of at least a central portion of the lens forming surface (31) of the mold half (3) with the aid of an infrared camera (1), collecting measurement values resulting from the infrared inspection, which represent a degree of residual moisture on and/or within the lens forming surface (31), comparing the collected measurement values with a predefined threshold value representing a maximum tolerable residual moisture on and/or within a lens forming surface of a reference mold half, and upon detection of an exceedance of the predefined threshold value representing the maximum tolerable residual moisture, preventing the inspected mold half (3) from being used further.