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Index profiling of distributed-index lenses by a shearing interference method.
1Tokyo Institute of Technology, Research Laboratory of Precision Machinery & Electronics, 4259, Nagatsuta, Midoriku, Yokohama, 227, Japan.
Applied Optics
|April 15, 2010
Summary
The transverse differential interference method accurately profiles distributed-index rod lenses. This technique successfully measured the 3-D index distribution of a planar microlens.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Distributed-index (DI) lenses are crucial optical components.
- Accurate characterization of their refractive index profile is essential for performance optimization.
- Existing profiling techniques may have limitations in resolving complex index distributions.
Purpose of the Study:
- To establish the transverse differential interference method as a reliable profiling technique for DI rod lenses.
- To quantify the accuracy and spatial resolution of this method.
- To apply the technique for measuring the 3-D index profile of a DI planar microlens.
Main Methods:
- Utilizing the transverse differential interference method for optical profiling.
- Conducting measurements on distributed-index rod lenses and planar microlenses.
- Analyzing the obtained data to determine index profiles, accuracy, and resolution.
Main Results:
- The transverse differential interference method was confirmed as a reliable profiling technique.
- The accuracy and spatial resolution of the method were clearly determined.
- The 3-D index distribution of a distributed-index planar microlens was successfully measured.
Conclusions:
- The transverse differential interference method offers a robust approach for characterizing DI lenses.
- This technique provides precise measurements of complex 3-D refractive index profiles.
- It is a valuable tool for the development and quality control of advanced optical components.
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