Real-time position and form measurement on CMMs by means of multi-function laser interferometry based on stabilized laser diodesFunded under: FP3-MAT
The increasing demands made in industrial metrology on the accuracy of manufactured components and measuring procedures make it necessary to find a precise and rapid measuring method which can be incorporated in machines used in production. The use of laser diodes in industrial environments is limited by the dependence of the wavelength upon the diode temperature. This disadvantage can be compensated by suitable wavelength-stabilising methods which use a stable reference, allowing the large number of advantages offered by the laser diode to be utilised in industrial metrology, for example, compactness, power consumption, high output power and long lifetime. In this project the spectral properties of several laser diode types have been investigated, to find a laser diode suitable for use as a light source in an interferometer. A FBI-stabilised diode laser has been developed and tested successfully in practical conditions. A transportable lambda-meter has been developed, set up and tested to perform traceable calibration of the wavelength of the FBI-stabilised diode laser with respect to a developed Rb-stabilised diode laser used as a wavelength reference. A refractometer for the determination of the refractive index of air has been developed and manufactured. A two-axis multi-function laser interferometer using the stabilised laser diode has been developed for measurements in two axes on a coordinate measuring machine. Experiments both in laboratory and workshop conditions have been carried out.
Bibliographic Reference: EUR 15939 EN (1995) 99 pp., MF, ECU 4
Record Number: 199411369 / Last updated on: 1995-03-21
Original language: en
Available languages: en