Spherical gradient-index polymer lens with low spherical aberration

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.