Nobuhiko Takeda

Title: Nobuhiko Takeda: Lens Measurement and Plastic Lens Manufacturing Innovations.

Introduction

Nobuhiko Takeda is an inventor associated with Tokyo, Japan. His patent work includes technologies for measuring lens shapes and manufacturing plastic lenses. He is credited with 6 patents and has worked with Hoya Corporation and Rion Company Ltd.

Latest Patents

One of Takeda’s latest inventions is a lens shape measurement device. It rotates a lens on a stage and uses a laser displacement meter to measure points along the lens edge. Moving units position the meter and lens, while a drive controller coordinates their motion to maintain a mirror-reflection measurement geometry.

Another patent describes methods and equipment for manufacturing plastic lenses. The disclosed techniques include mixing polymerizable components and casting the mixture into a mold, as well as casting and curing lens starting material. Related components include a cylindrical gasket that holds two molds opposite one another to form a lens-shaped cavity, a casting jig with a nozzle, and a holding member for the casting mold.

Career Highlights

Takeda’s patent portfolio reflects work across lens measurement and plastic lens production. His inventions address both the precision needed to measure lens edges and the equipment and processes used to cast and cure plastic lenses.

Collaborations

Takeda’s listed coworkers include Akira Hamanaka and Tatsuo Nishimoto. His professional associations include Hoya Corporation and Rion Company Ltd.

Conclusion

Nobuhiko Takeda’s patents focus on practical technologies for measuring lens shapes and manufacturing plastic lenses, connecting precision measurement with mold-based production.