Sy Hieu Dau

Title: Sy Hieu Dau and Automated Inspection of Ophthalmic Lenses.

Introduction

Sy Hieu Dau is an inventor based in Singapore. His work includes a patented system for inspecting wet ophthalmic lenses, designed to identify defects and measure lens geometry while the lens is immersed in saline solution. He is associated with Emage Vision Pte. Ltd.

Latest Patents

The patent, “System and method for inspecting mold defects in wet ophthalmic lenses,” describes an inspection setup combining a camera, electronically controlled visible and infrared LED illumination, and image-processing tools. A custom glass cuvette with concave, concentric, spherical surfaces is designed to hold the lens centrally while minimizing added optical power. A strobe controller coordinates the camera and lighting to capture multiple images in quick succession under different illumination conditions. The images are then analyzed to determine whether the lens is acceptable or should be rejected.

Dau is credited with 1 patent.

Career Highlights

Dau’s disclosed invention focuses on automating quality inspection for cosmetic ophthalmic lenses. By combining controlled lighting, rapid image capture, and image analysis, the system is intended to support consistent defect detection and geometric measurement.

Collaborations

Dau is associated with Emage Vision Pte. Ltd. His listed coworkers include Jia Yaw Tan and Hoang Bao Nguyen.

Conclusion

Sy Hieu Dau’s patent presents an integrated approach to inspecting wet ophthalmic lenses, bringing together specialized optics, configurable illumination, and image processing for lens quality assessment.