CNC (Computerized Numerical Control) machined components are converted into complex geometrical shapes inside CNC machines with the help of modern CAD software. These include CNC sawing and CNC grinding.
Sawing is used in mass manufacturing and to achieve dimensional accuracy. Grinding makes it possible to manufacture workpieces with a maximum diameter of up to 4.25 m. Carefully-trained employees and extremely precise processes developed by us, together with strict quality controls, result in products of the highest quality and precision.
SCHOTT has access to technologies for use in etching substrates made of glass and glass-ceramics. A specially-developed system makes it possible to etch mirror substrates made of the extremely low expansion material ZERODUR® (diameters of up to 4.25 m) to reduce tensions inside the material that are caused by processing and increase its resistance to breakage
The MRF polishing (magnetorheological fine processing) machines at SCHOTT allow for the rotation symmetry of spherical and aspherical surfaces to be processed extremely accurately and enable superior surface quality thanks to the high flexibility of the polishing liquid. Polished aspheres can be manufactured from spheres using a cold processing process, for instance.
SCHOTT is capable of polishing all of its products, including zinc sulfide and infrared chalcogenide glasses.
Our company uses two different polishing techniques:
a.) Polishing by way of mechanical means used for optical components
b.) Fire-polishing performed while the glass is being manufactured, for thin glasses, for instance
SCHOTT offers single- and double-sided polishing to produce plano and plano-plano-parallel components (with a max. diameter of up to 650 mm, for instance) as well as single-sided polishing of spherical and aspherical surfaces.
A geometrically-defined single grain diamond makes it possible to produce extremely precise surfaces. At SCHOTT, this machine is mainly used to process aspherical lenses made of infrared material with a maximum diameter of 250 mm.
By combining ultrasound excited tools and a solvent that contains abrasive components, machine-defined structures can be produced in wafers to meet specific customer requirements. SCHOTT is even capable of structuring large surfaces in a single working process.
Pressed blanks are shaped into optical glasses with matte or naturally blank surfaces with the help of hot processing under pressure. Pressings already come in the shape of the optical components, lens pressings, prism pressings, etc. to be used later on.
With cementing, two or three optical components (lenses or glass plates, for instance) are bonded together with the help of special synthetic resins or mechanical techniques. For example, when two or three lens elements are cemented together, they produce achromatic doublets or triplets that limit the effect of spherical and chromatic aberration.
With framing, optical elements, for example filters, are typically given a frame made of metal or plastic that makes it easier to use them in the customer’s devices.
Thanks to a specially-developed sandblasting technique, specific structures can be created in wafers with the help of structuring masks that are specially designed to suit the respective final product.