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Passively-coupled, low-coherence interferometric duct profiling with an astigmatism-corrected conical mirror
Optics Express
|April 26, 2017
Summary
This study demonstrates improved duct-profiling using a novel optical probe. A new lens element significantly enhances imaging resolution and beam focus for precise measurements.
Area of Science:
- Optical Engineering
- Biomedical Optics
Background:
- Accurate duct-profiling is crucial for various medical and industrial applications.
- Existing optical methods face limitations in resolution and focus depth.
Purpose of the Study:
- To develop an advanced optical probe for high-resolution duct-profiling.
- To enhance imaging capabilities by mitigating optical aberrations.
Main Methods:
- Utilized a passive, low-coherence probe head with a conical mirror and single-mode fibers.
- Incorporated a novel lens element to correct astigmatism and improve beam focus.
- Performed Zemax modeling and experimental validation.
Main Results:
- Achieved duct-profiling in samples up to 25 mm in diameter with 7.8 μm depth resolution.
- The novel lens element enabled effective beam focus at distances of tens of millimeters.
- Demonstrated a four-fold improvement in lateral imaging resolution compared to the conical mirror alone.
Conclusions:
- The developed optical probe with an integrated lens element significantly improves duct-profiling accuracy and resolution.
- This technology offers enhanced capabilities for detailed imaging of internal structures.
