Visualization of spherical aberration using an optically levitated droplet as a light source.

Area of Science:

• Optics and Photonics
• Optical Metrology

Background:

• Optical aberrations significantly degrade image quality in optical systems.
• Simultaneous aberrations complicate the diagnosis and visualization of specific optical distortions.

Purpose of the Study:

• To develop a novel method for visualizing and quantifying lens aberrations, specifically spherical aberration and coma.
• To demonstrate the utility of an optically levitated droplet as a unique light source for aberration analysis.

Main Methods:

• Utilized an optically levitated droplet as a micro double point source.
• Analyzed diffraction patterns generated by the droplet when focused by a lens.
• Employed Zernike polynomials for quantitative aberration analysis through comparison with numerical simulations.

Main Results:

• Observed distinct visual patterns (comets, barreling, hyperbolic triangles, spider pattern) resulting from the focused droplet.
• Correlated these patterns directly to the presence of spherical aberration and coma.
• Successfully quantified aberration values by matching experimental patterns to numerical simulations.

Conclusions:

• An optically levitated droplet serves as an effective tool for visualizing complex lens aberrations.
• The generated patterns provide intuitive indicators of spherical aberration and coma.
• This method offers a promising approach for aberration quantification and optical system diagnostics.