Diamond turning

Ultra-precise turning using diamond


What is diamond turning

Ultra-precise turning using monocrystalline diamond tooltips is the way to manufacture nearly any kind of optical surface shape with high precision and very low surface roughness values. Due to a very stable lathe and CNC precision control to nanometer levels it makes diamond turning especially profitable for prototyping and low volumes manufacturing. It gives complete control of shape just by programming and by this realizes single optics quite fast compared to conventional polishing techniques.

Another advantage of diamond turning is that innovative flange designs can be integrated into the design of the optical component, which can make assembly faster and more productive due to less alignment issues.

Materials that can be processed by diamond turning:

Non-ferrous metals: Aluminum, copper, brass, nickel.
Plastics: PMMA, PC, Zeonex, Topaz, OKP, APL, etc.
IR lens materials: Silicon, germanium

Part sizes: 1 – 400 mm
Shapes: Aspherical, spherical, parabolical, elliptical (both also off-axis), fresnel, diffrax
With slow servo tool: torics, biconics, cylinder, free form, microlenses

Optical requirements (ISO 10110):
Shape accuracy (PV): < 100 nm, depending on diameter, material and geometry.
Shape accuracy (RMS): < 15 nm, depending on diameter, material and geometry.
Surface roughness (Rq): down to 2 nm, depending on material.