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Extending the unambiguous range of two-color interferometers
Applied Optics
|October 12, 2010
Summary
Two-color interferometry
Area of Science:
- Optics and Photonics
- Metrology
Background:
- Two-color interferometry uses multiple wavelengths to measure distances.
- The unambiguous range is typically limited by the synthetic wavelength.
Purpose of the Study:
- To extend the unambiguous distance measurement range in two-color interferometry.
- To overcome limitations imposed by the synthetic wavelength.
Main Methods:
- Utilizing optical phase information.
- Determining the synthetic-wavelength fringe order.
Main Results:
- Demonstrated extension of the unambiguous measurement range beyond the synthetic wavelength limit.
- Successfully employed optical phase data for fringe order determination.
Conclusions:
- The unambiguous range in two-color interferometry can be significantly extended.
- Optical phase information is key to overcoming traditional measurement limitations.
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