Realization of precision machining and longer tool life for plastic lens molds

[Issue]
A large number of plastic lenses are used in smartphones, and there is a need for larger lenses and even wider angles to achieve higher sensitivity due to competition in camera functions. In order to achieve this, the machining accuracy of lens molds is crucial. In addition, in order to reduce the cost of mass-produced lenses, longer tool life is required in the machining of molds.


[Solution]
The use of mono-crystal diamond tools with a superior profile of cutting edge and almost no scratches on the cutting edge and rake enables high precision mold forming. The use of natural diamond, which is more resistant to wear than synthetic diamond, enables the tools to have a longer life.