Simple method based on intensity measurements for characterization of aberrations from micro-optical components.

Area of Science:

• Optical Engineering
• Micro-optics
• Metrology

Background:

• Characterizing micro-optical elements is crucial for advanced optical systems.
• Existing methods for wavefront and aberration analysis can be complex or require specialized equipment.
• Accurate assessment of micro-optical performance is essential for optimizing fabrication processes.

Purpose of the Study:

• To develop a simple, intensity-based method for characterizing wavefronts and aberrations of micro-optical focusing elements.
• To quantify optical aberrations using Zernike polynomial decomposition.
• To demonstrate the technique's utility in optimizing micro-optical component fabrication.

Main Methods:

• Utilizes a previously established setup for 3D point spread function measurements.
• Applies a basic phase-retrieval algorithm to intensity measurements.
• Employs an in-motion imaging system and Zernike polynomial decomposition for wavefront analysis.

Main Results:

• Successfully retrieved the wavefront generated by a micro-optical element.
• Quantified optical aberrations present in the micro-optical element.
• Demonstrated the method's effectiveness by characterizing a planoconvex microlens.

Conclusions:

• The developed intensity-based method provides a simple yet effective means for wavefront and aberration characterization of micro-optics.
• This technique facilitates the optimization of micro-optical component fabrication processes.
• The approach offers a practical solution for metrology in micro-optics.