Publication

Interferometer coordinate measurement system for use in measurement and machining tools has partially reflecting boundary surfaces within its measurement head with a separation shorter than the coherence length

Theo Lasser
2004
Patents

Abstract

The invention relates to an interferometer system (41), especially for use in a co-ordinate measuring system. Said interferometer system comprises, disposed in an illumination beam path, a pair of spaced-apart boundary surfaces (52, 53). A boundary surface (53) facing an object (9) is arranged in a detection beam path, a detector (61) being additionally disposed in said detection beam path. The invention also relates to an interferometer system, especially one of the above-described type, which is provided with a speed indicating system for detecting a relative speed between the test head and the object. A frequency filter of the interferometer system is adjusted depending on the relative speed.

Official source

https://infoscience.epfl.ch/entities/publication/4fe9a4b9-f137-4116-9d45-26213d454b1b

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Theo Lasser
2004
Patents

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/4fe9a4b9-f137-4116-9d45-26213d454b1b

About this result

Related concepts (32)

Interferometry

Interferometry is a technique which uses the interference of superimposed waves to extract information. Interferometry typically uses electromagnetic waves and is an important investigative technique in the fields of astronomy, fiber optics, engineering metrology, optical metrology, oceanography, seismology, spectroscopy (and its applications to chemistry), quantum mechanics, nuclear and particle physics, plasma physics, biomolecular interactions, surface profiling, microfluidics, mechanical stress/strain measurement, velocimetry, optometry, and making holograms.

Electronic filter

Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic components, as opposed to distributed-element filters. That is, using components and interconnections that, in analysis, can be considered to exist at a single point. These components can be in discrete packages or part of an integrated circuit. Electronic filters remove unwanted frequency components from the applied signal, enhance wanted ones, or both.

Analogue filter

Analogue filters are a basic building block of signal processing much used in electronics. Amongst their many applications are the separation of an audio signal before application to bass, mid-range, and tweeter loudspeakers; the combining and later separation of multiple telephone conversations onto a single channel; the selection of a chosen radio station in a radio receiver and rejection of others.

Related publications (10)

Interferometer coordinate measurement system for use in measurement and machining tools has partially reflecting boundary surfaces within its measurement head with a separation shorter than the coherence length

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