Invention Grant
- Patent Title: Systems and methods for automatic visual inspection of defects in ophthalmic lenses
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Application No.: US17028429Application Date: 2020-09-22
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Publication No.: US11650126B2Publication Date: 2023-05-16
- Inventor: Juan Antonio Quiroga Mellado , José Alonso Fernández , Eduardo Pascual , Sergio Sampedro , Daniel Crespo Vázquez
- Applicant: Indizen Optical Technologies S.L.
- Applicant Address: ES Madrid
- Assignee: Indizen Optical Technologies S.L.
- Current Assignee: Indizen Optical Technologies S.L.
- Current Assignee Address: ES Madrid
- Agency: SoCal IP Law Group LLP
- Agent Angelo Gaz; Mark A. Goldstein
- Main IPC: G01M11/02
- IPC: G01M11/02 ; G01N21/958

Abstract:
Automatic visual inspection (AVI) systems and methods are disclosed for inspecting transmissive lenses using a plurality of camera poses to provide deflectometric measurements using fringe patterns from at least two points of view. Phase and/or modulation visibility values of the deflectometric measurements are measured for two sensitivities of the patterns taken through an inspection area of the lens from the points of view. Defects are detected based on the phase and/or modulation visibility values at a defect location as compared to at the local area. A defect type is classified to be prismatic, transmissive, lenslet or cosmetic based on the phase and/or modulation visibility values. The defect is localized on the front or back surface of the lens based on the phase and modulation visibility values, and a geometry of the lens orientation. The lens can be invalidated based on defect types, numbers, relative positions and locations.
Public/Granted literature
- US20220090983A1 SYSTEMS AND METHODS FOR AUTOMATIC VISUAL INSPECTION OF DEFECTS IN OPHTHALMIC LENSES Public/Granted day:2022-03-24
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