COMPAS-S is an application of our COMPAS process to single piece optics, as opposed to our COMPAS-W process which applies it to wafer-level optics. COMPAS-s is the solution for polymer imaging lenses requiring quality as normally only achievable in glass. Lenses coming out of our monolithic multi-cavity molds in this process, are gate-free (no gate marks) and require no post-processing. COMPAS-S molds are made using our DPI technology, COMPAS stands for Compression Molded Polymer Aspheres, for more information on these processes, have a look at our Technology page.

COMPAS molded lenses

COMPAS-s is an efficient way to make glass-quality lenses in an isothermal polymer molding process by making use of parallelization, i.e. multi-cavity molds. Our multi-cavity molds can contain from a dozen to a hundred lenses depending on the size, with no negative effect on the surface form error. This isothermal polymer molding process allows to replicate intricate details with a high accuracy, that can never be achieved using conventional injection-compression molding. This makes it possible to include mechanical, centration and other functions next to the optical surfaces.

Process Isothermal closed-cavity precision pressing
Designs Double-sided spherical, highly aspherical, freeform, Fresnel, diffractive, MLA, mechanical I/F and centration
Diameter 5-40 mm, ± 5 µm
Center thickness 1-23 mm, ± 2 µm
Form accuracy (ISO 10110-5) 3/2(0.5)
Surface finish Typically 2 nm Ra
Centration upper to lower surface Up to 1-2 µm
Internal corner radius < 5 µm
Birefringence < 20 nm/cm
Gate marks None
Materials Thermo-formable polymers: PC, PMMA, TOPAS, ZEONEX, OKP4, etc

Possible applications are numerous and cover a wide range of industries. We have already successfully applied this technology to:

  • Lenses for medical imaging devices
  • Micro-Lens Arrays for automotive lighting
  • Lenses for military night view
  • etc.