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Precision Glass Molded – The Right Step Towards Economic Optical Solutions

As one of the first optic manufacturers in Europe, FISBA OPTIK employs this groundbreaking technology. Customised designs can be offered as cost-effective options for conventionally-manufactured optics in the same quality. Not only low costs with medium- and large-sized lots but also consistent quality and high precision as well as better time-to-market performance are features which customers are looking for more and more.

Most important of all, companies are increasingly asking for strong, high-quality aspheres or optics with complex geometries made of glass. Only recently has FISBA invested in the newest generation of tactile metrology, and now perfectly meets the increasing demand of precision glass molded cylinder arrays and free form surfaces. Moreover, FISBA is also capable to qualify them.

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Next to the tooling – it is important that the optic design is customised to the fabrication process. FISBA’s optic designers are wellversed in adapting existing designs to the specifications of this fabrication method, taking the variation of the material characteristics into account.

In addition, it is now possible for FISBA ‘s designers to develop innovative and economic optical solutions by taking advantage of the new design possibilities which this technology provides. By establishing a close partnership with glass suppliers, FISBA’s design specialists make sure they keep up with the latest developments regarding material behavior.

In precision glass molding, optics are formed from blanks of optical glass. The process is fully automated: a robot transfers the blanks to the molding tool, before the optics are molded at temperatures slightly above the transformation temperature (Tg). Following the cooling period, the parts are moved back to the tray, and subsequently coated and qualified.

The contact zone between the glass and the tool is crucial for the high accuracy of the finished optics. The ultra-precise molding forms are expected to generate functional optical surfaces, which meet the highest technological standards. FISBA works hand-in-hand with machine manufacturers and tooling specialists in Europe, to increase its know-how in this area to ensure the optimised application of this manufacturing method.