With the upc tool on the mold for ultra-precision machining is moving towards high precision and more micro-processing direction. From cd to cd, the continuous development of the type of discs need to pick up the lens mold is also constantly sophisticated, therefore, the processing of such mold

With the pick-up with aspherical lens plastic and high-precision progress, requiring processing die is not round) must have a very high accuracy. Now has started out one

With the optical disc products continue to small shape of the development of the lens is also increasingly miniaturization, curvature is also increasingly reduced. The radius of the tool radius of the upc tool is also determined by r1.0

With the advent of dvd, in order to produce dvd and cd can share the parts, the optical system is more complex, the lens is also more tiny, including the number of optical components, including lenses decreased. In order to focus the complex optical element functions on one optical element, a holographic element utilizing the diffraction effect is produced.