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The intraocular lens (IOL) industry is continuously evolving with more complex surface designs that require affordable and timely surface measurements of extended depth of focus (EDOF) and diffractive multifocal lenses. Current systems to measure grating profiles, such as AFM, SEM, or optical profilometers are expensive, need intensive training, and are sometimes destructive. Furthermore, the fields of view of these systems are typically limited, so measuring the full aperture of the lens requires repeated measures and stitching of the result. The system developed allows for quick profile measurements with easy to obtain equipment that will help examine and develop diffractive multifocal IOLs. This study integrates a 3D GelSight camera (GelSight, Inc, Waltham, Massachusetts), a stepper motor, and an Arduino board with driver board to automate the measurement of IOL gratings. The GelSight 1.0X camera has a height resolution of 1.0 μm and is provided with software that will be used to select and export data from areas of interest. Post processing will be required to analyze the data from the GelSight, but can be customized to the user’s needs. Using simple Arduino code and a stepper motor to move the camera onto the sample allows for a hands-free measurement technique that promotes accuracy and repeatability. Automation allows for beginners to quickly use the newly proposed system for many profile measurement applications with little setup time. The system will benefit the development of IOLs as a quick and easy check for the production process of these advanced lens designs.
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