INTERFEROMETER SYSTEM AND METHOD TO GENERATE AN INTERFERENCE SIGNAL OF A SURFACE OF A SAMPLE
First Claim
1. An interferometer system to generate an interference signal of a surface of a sample comprising:
- a broadband illuminator configured to provide a broadband illumination beam;
a beam splitter configured to split the broadband illumination beam into a reference beam for reflection on a reference reflector and into a measurement beam for reflection on the surface of the sample;
a detector configured to receive an interference radiation intensity created between the reference beam reflected from the reference reflector and the reflected measurement beam from the surface of the sample to generate an interference signal; and
a continuous variable broadband reflector in at least one of the beam splitter and the reference reflector and configured to adjust the broadband radiation intensity balance between the measurement beam and the reference beam.
1 Assignment
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Accused Products
Abstract
An interferometer system to generate an interference signal of a surface of a sample includes a broadband illuminator to provide a broadband illumination beam, a beam splitter to split the broadband illumination beam in a reference beam for reflection on a reference reflector and a measurement beam for reflection on the surface of the sample, and a detector to receive an interference radiation intensity created between the reference beam reflected from the reference reflector and the reflected measurement beam from the surface of the sample to generate an interference signal. The interferometer system having a continuous variable broadband reflector in the beam splitter and/or the reference reflector to adjust the broadband radiation intensity balance between the measurement beam and the reference beam.
16 Citations
15 Claims
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1. An interferometer system to generate an interference signal of a surface of a sample comprising:
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a broadband illuminator configured to provide a broadband illumination beam; a beam splitter configured to split the broadband illumination beam into a reference beam for reflection on a reference reflector and into a measurement beam for reflection on the surface of the sample; a detector configured to receive an interference radiation intensity created between the reference beam reflected from the reference reflector and the reflected measurement beam from the surface of the sample to generate an interference signal; and a continuous variable broadband reflector in at least one of the beam splitter and the reference reflector and configured to adjust the broadband radiation intensity balance between the measurement beam and the reference beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method to generate an interference signal of a surface of a sample with an interferometer system, the method comprising:
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providing a broadband illumination beam; splitting, by a beam splitter, the illumination beam into a reference beam for reflection on a reference reflector and into a measurement beam for reflection on the surface of the sample;
receiving an interference radiation intensity created between the reference beam reflected from the reference reflector and the reflected measurement beam from the surface of the sample on a detector creating an interference signal;adjusting the broadband radiation intensity balance between the measurement beam and the reference beam with a continuous variable broadband reflector in at least one of the beam splitter and the reference reflector.
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Specification