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Fabrication of Polymer Microspheres for Optical Resonator and Laser Applications

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Spherical gradient-index polymer lens with low spherical aberration.

Y Koike, A Kanemitsu, Y Shioda

|October 2, 2010

Summary

Gradient index (GRIN) sphere lenses were fabricated using modified suspension polymerization. These GRIN spheres significantly reduced spherical aberration compared to traditional homogeneous spheres, improving focusing properties.

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Area of Science:

Optics and Photonics
Materials Science

Background:

Homogeneous sphere lenses suffer from significant spherical aberration, limiting their focusing performance.
Gradient index (GRIN) materials offer a potential solution to mitigate optical aberrations.

Purpose of the Study:

To investigate the effect of spherical gradient index (GRIN) profiles on the focusing properties of sphere lenses.
To compare the optical performance of GRIN sphere lenses with homogeneous sphere lenses.

Main Methods:

Fabrication of GRIN spheres using a modified suspension polymerization technique.
Preparation of GRIN spheres with distinct quadratic and linear index distributions.
Theoretical analysis and experimental validation of focusing properties.

Main Results:

Successfully synthesized GRIN spheres with controlled index profiles.
Demonstrated a remarkable reduction in spherical aberration for GRIN spheres compared to homogeneous spheres.
Confirmed theoretical predictions through experimental measurements.

Conclusions:

Spherical GRIN lenses significantly outperform homogeneous lenses in reducing spherical aberration.
The GRIN profile is crucial for enhancing the focusing capabilities of sphere lenses.
Modified suspension polymerization is an effective method for fabricating GRIN sphere lenses.