Method of generating interferometric information
First Claim
1. A method of generating interferometric information, comprising:
- a. Collecting information from a reference channel from a refractively scanned interferometer;
b. Collecting information from a data channel from the interferometer; and
c. Generating interferometric information by interpolating the data channel data based on a relationship between the optical path difference of the reference channel and the optical path difference of the data channel.
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Abstract
The present invention provides methods for generating interferometric information. Interferometric information from refractively scanned interferometers can contain errors due to wavelength-dependent refractive indices. The wavelength-dependent refractive indices of elements of the interferometer can produce errors when the OPD at a reference wavelength is different than the OPD at a sample wavelength. The invention can provide correction of interferometric information using relationships between the OPD at the wavelengths of interest, which correction can also be dependent on physical relationships among elements of the interferometer.
44 Citations
11 Claims
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1. A method of generating interferometric information, comprising:
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a. Collecting information from a reference channel from a refractively scanned interferometer;
b. Collecting information from a data channel from the interferometer; and
c. Generating interferometric information by interpolating the data channel data based on a relationship between the optical path difference of the reference channel and the optical path difference of the data channel.
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2. A method of generating interferometric information, comprising:
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a. Collecting reference data from a refractively scanned interferometer at a reference wavelength while the interferometer is configured with a first plurality of OPDs;
b. Collecting sample data from the interferometer at one or more sample wavelengths while the interferometer is configured with the first plurality of OPDs; and
c. Determining a relationship of sample data to OPD from the sample data and the first plurality of OPDs adjusted by a relationship between OPD at the reference wavelength and OPD at a selected sample wavelength. - View Dependent Claims (3, 4, 5, 6, 7)
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8. A method of generating interferometric information using a refractively scanned interferometer, comprising:
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a. Determining the refractive index of a refractive scanner in the interferometer at a reference wavelength and at a selected sample wavelength;
b. Determining the relationship between OPD at the reference wavelength and OPD at the selected sample wavelength for a plurality of OPDs at the reference wavelength;
c. For each of a plurality of interferometer configurations, collecting interferogram data at the reference wavelength and at the selected sample wavelength;
d. Determining the OPD at the reference wavelength corresponding to each of the plurality of interferometer configurations;
e. Determining the OPD at the selected sample wavelength corresponding to each of the plurality of interferometer configurations from the OPD at the reference wavelength and the determined relationship;
f. Associating the interferogram data at the selected sample wavelength with the determined OPD at the selected sample wavelength. - View Dependent Claims (9, 10, 11)
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Specification