Phase-retrieved pupil functions in wide-field fluorescence microscopy.

Area of Science:

• Optical microscopy
• Computational imaging
• Image processing

Background:

• Microscope imaging properties are often described by the 3D point spread function (PSF).
• Estimating the PSF can be computationally intensive and susceptible to noise and artifacts.
• Wide-field optical systems require robust methods for characterizing their imaging capabilities.

Purpose of the Study:

• To computationally estimate and utilize 2D pupil functions from measured 3D PSFs for microscopy.
• To demonstrate the ability of pupil functions to suppress artifacts and noise.
• To show that pupil functions can be easily modified to correct for optical aberrations.

Main Methods:

• Computationally estimating microscope pupil functions from measured point spread functions (PSFs) using phase retrieval algorithms.
• Compacting 3D PSF information into a 2D pupil function.
• Modifying pupil functions by multiplying with calculated aberration functions.

Main Results:

• Phase-retrieved pupil functions effectively suppress artifacts and noise compared to 3D PSFs.
• Modified pupil functions accurately predict PSFs under aberrated conditions.
• Image deconvolution using phase-retrieved, calculated PSFs performed comparably to using directly measured PSFs.

Conclusions:

• Pupil functions provide a compact and modifiable description of optical system imaging properties.
• Phase retrieval offers an efficient method for characterizing microscope pupil functions.
• Modified pupil functions enable accurate aberration correction and improved image deconvolution in microscopy.