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Hamamatsu Corp. - Earth Innovations LB 2/24

On-Machine Testing of Optical Quality

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A commercial compact digital interferometer, directly mounted on an ultraprecision diamond-turning machine, offers an alternative to today’s stylus-based machine-integrated measuring systems and provides fast noncontact testing of optical surfaces.

Thomas Blümel, Fisba Optik GmbH, Berlin, and Markus Bosse and Martin Kurz, IWF, Technical University Berlin

Interferometers often are seen as laboratory instruments, requiring rooms with controlled environments, skilled operators and adequate space. Apart from the fact that this is not necessarily true of all devices on the market, integration of interferometric sensors directly into production lines still is a challenge because they face harsh conditions — dirt, dust, vibration, temperature variances, ambient light. Furthermore, production line integration requires that sensors be compact, robust, adaptable and able to operate in any direction and to deliver results quickly. Figure 1. The...Read full article

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    Published: February 2008
    Glossary
    ambient light
    Light present in the environment around a detecting or interpreting device, especially a machine vision system, and generated from outside sources. Such light must be treated as noise by the vision system.
    sensor
    1. A generic term for detector. 2. A complete optical/mechanical/electronic system that contains some form of radiation detector.
    ambient lightEuropeindustrialinterferometersMicroscopyNews BriefsPhotonics Tech BriefssensorSensors & Detectors

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