Non-Isothermal
Glass Molded Optics
Non-Isothermal glass molding or simply glass molding is a different manufacturing technology than ‘precision’ glass molding. Isothermal simply describes a process in which the temperature remains constant. Non-Isothermal glass molding occurs at much higher temperatures and lower viscosities than PGM. The viscosity of the glass during glass molding is in the range of the working point where the glass can flow freely. The process is similar to blank or reheat pressing but is more precise.
Speed vs. Precision Tradeoffs
The non-isothermal glass molding process is very economical due to very fast cycle times compared to precision glass molding, but it comes with a cost. Tolerances are an order of magnitude less precise, hence the use primarily in illumination applications only.
Complex Geometries at Scale
Non-isothermal glass molding enables the economical production of complex optical components, including micro-structured surfaces. Its short cycle times and elimination of secondary finishing steps make it highly suitable for high-volume manufacturing. Materials are primarily limited to borosilicate and soda-lime glass.
Illumination and Condenser Applications
Non-isothermal glass molding is primarily used for illumination optics and condenser lenses. A condenser lens collects and concentrates light from a source and directs it into an optical system in a controlled, uniform beam. It is commonly used to improve illumination efficiency and enhance image brightness and contrast in systems such as microscopes, projectors and imaging devices.
