Glass molding technologies are suitable for the economic production of precision optics for a large diversity of applications and quantities. By heating up the glass the viscosity of the glass is reduced to an extent that allows the deforming of the glass between two hot tools. The optical surface which is created this way does not require any finishing. Depending on the required geometry, precision as well depending on the quantities, GD Optics puts different technologies into operation:

High precision optics in low or medium sized quantities

Manufactured by isothermal precision molding

  • two finished highly precise optical surfaces
  • large variety of optical glasses deployable

Precision optics in large to very large quantities

Manufactured by non-isothermal precision molding

  • two finished optical surfaces
  • broad range of tolerances achievable
  • large variety of optical glasses deployable
  • very short to medium process times

Our non-isothermal molding process also includes molding from a rod. This production method only provides one finished optical surface. The backside of the surface is finished by grinding and polishing. However molding from a rod is suitable for a large variety of different geometries (e.g. aspheres, segmented optics). Due to its very short processing time, molding from a rod is an enormously economic process.


Isothermal, as well as non-isothermal molding processes can be scaled up to high volumes using multi cavity molds.