Distance and thickness measurement

Measuring station for automatic centre thickness inspection

... using the example of a moulding tool for contact lens production.

Even minimal deviations in center thickness can affect the wearing comfort of contact lenses. Highly precise center thickness measurement is therefore essential.

Technical Description

  • Distance measurement device – between mold and counter-mold
  • Configuration interface programming – for flexible adjustment of measurement parameters
  • Automated sequence programming – for the so-called CTS (Center Thickness System)
  • Programming – in NI LabVIEW
  • Digital I/O – via PCI card, 19" industrial PC
  • Distance measurement on mold tools – distance between core and cavity for contact lens manufacturing
  • Connection to a central laser interferometer – via fiber optic cable
  • Optical channel switching – i.e., measurement position switching via RS-232 through an Agiltron fiber optic switch
  • Color-coded indication – of target value deviation or tolerance violation per measurement channel
  • Optional display of measured values – difference from target value or difference from the previous measurement
  • Multiple authorization levels – user, supervisor, administrator
  • Encrypted storage of measurement data – for data security
  • Retrieval and printing of historical measurement data – for complete traceability
  • Automatic deletion of outdated measurement records – via a separate Windows service
  • Handshake between measurement program and Windows service – for reliable data exchange