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A Multimodal Wide-Field Fourier-Transform Raman Microscope

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Wavefront sensing with an axicon.

Brian Vohnsen¹, Sara Castillo, Diego Rativa

¹School of Physics, University College Dublin, Dublin, Ireland. brian.vohnsen@ucd.ie

|March 16, 2011

Summary

This summary is machine-generated.

A novel wavefront sensing technique uses a large apex-angle axicon, similar to point-diffraction interferometry. This axicon-based method is confirmed effective for wavefront sensing, despite potential limitations from its refraction.

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Area of Science:

Optics and Photonics
Wavefront Sensing Technology

Background:

Common-path interferometry offers advantages in stability for optical measurements.
Point-diffraction interferometry is a established technique for wavefront analysis.
Pyramidal wavefront sensing provides a reference for complex optical systems.

Purpose of the Study:

To propose and theoretically develop the use of a large apex-angle axicon for common-path interferometric wavefront sensing.
To investigate the feasibility and characteristics of axicon-based wavefront sensing.
To compare numerical simulations with experimental data for validation.

Main Methods:

Theoretical formulation of wavefront sensing using an axicon.
Numerical simulations to model the axicon's performance.
Experimental validation using spherical and cylindrical ophthalmic trial lenses.

Main Results:

The axicon was confirmed as a viable component for wavefront sensing.
The theoretical framework for axicon-based sensing was established.
Experimental results aligned with simulation outcomes, demonstrating the principle.

Conclusions:

A large apex-angle axicon can be effectively employed for common-path interferometric wavefront sensing.
The axicon approach is a variant of point-diffraction interferometry.
Axicon refraction presents challenges that may limit the operational range of this sensing method.