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US 2004/0165192 A1Published application
Device and method for determining the chromatic dispersion of optical components
AssigneeThorlabs, Inc.
InventorEgbert Krause
Life of this patent
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Abstract
It is to be possible for the chromatic dispersion of a sample (4) to be determinable in an improved manner. To this end the sample (4) is radiographed, in an interferometer (10), with the light of a radiation source (1). A downstream polarimeter (50) measures both the power changes and the polarisation changes of the interference radiation. In the downstream evaluation unit (7) the wavelength-dependent chromatic dispersion can be determined.
Claims8
Device for determining the chromatic dispersion of a sample (4) with
- a radiation source (1) for emitting a radiation with different wavelengths,
- an interferometer apparatus (10) which comprises a reference arm (12) and a measurement arm (13) and which is irradiatable by the radiation source (1), for generating a sample-specific interference radiation,
- a measurement apparatus, with which power changes and polarisation changes of the interference radiation are measurable, and
- an evaluation apparatus (7), with which the chromatic dispersion of the sample (4) is determinable on the basis of the power changes and the polarisation changes,
- characterised in that
- the measurement apparatus comprises a polarimeter (50).
3 more elements
Method for determining the chromatic dispersion of a sample (4) with the steps:
- generating an electromagnetic beam of a radiation with different wavelengths,
- splitting the beam into a reference beam (12) and a measurement beam (13) with which the sample (4) is radiograped,
- superimposing the reference beam and the measurement beam whilst retaining an interference beam,
- measuring power changes and polarisation changes of the interference beam as a function of the wavelength of the radiation, and
- determining the chromatic dispersion of the sample (4) on the basis of the wavelength-dependent power changes and polarisation changes,
- characterised in that
- the measuring takes place with a polarimeter (50).
4 more elements
Dependencies are inferred from the claim text.