Facilities

The custom-built diamond machining facility houses two CNC single point diamond turning lathes. The facility is capable of routinely producing complex non-spherical surfaces on a comprehensive range of optical materials and metal alloys.

Lathes of different sizes and capabilities provide great flexibility for assigning different workloads to different tools, ensuring the shortest delivery timescales for customers.

Surface Finish

Precision Solutions’ commitment to producing high quality diamond machined components includes optical surface inspection using a number of techniques at its custom-built diamond machining facility. Microscopic defects which affect the texture of a surface include general random and periodic surface structure and isolated surface features such as scratches. Random and periodic structure is commonly referred to as surface roughness. Isolated surface features can often be ignored as they tend to have a small effect on the optical system and can be considered as cosmetic defects. Surface roughness however can have a large effect on an optical system as it tends to cover a large area of the surface that is being machined. The ability to analyse the quality of a optical surface is important in order to check that the surface meets the drawing specification.

Visual Inspection

Visual inspection of diamond machined surfaces is carried out using a VMZ20X industrial macro video microscope. This robust microscope has a wide ranging par focal (constant focus) zoom and light sensitive camera which allows real-time Scratch and Dig and Surface Roughness determination.

The microscope has excellent depth of field, a x130 magnification and image capture capabilities which allow complex diamond turned components to be accurately measured with results being saved.

Surface Profiling

Surface profiling of diamond machined components is carried out using a TalySurf CCI non-contact 3D surface profiler. This is an advanced type of measurement interferometer which uses a patented correlation algorithm to find the coherence peak and phase position of an interference pattern produced by a selectable bandwidth light source. The instrument can measure surface roughness in two dimensions, thus providing a more reliable measurement for the surface as a whole. This 3D surface texture, step height and micro dimensional measurement system gives accurate measurements in seconds. Surface texture (RMS) to sub-angstrom levels can be measured. Micro roughness, waviness, feed rate and depth of cut on Diamond Machined surfaces can be therefore be accurately evaluated.

  • 0.1 Å vertical resolution
  • 0.36 μm lateral resolution
  • 1,048,576 data points
  • 0.03 Å RMS repeatability

Components up to 300 mm2 in size and specimen areas up to 7.2 mm2 can be measured without stitching.