Widefield fluorescence microscopy with sensor-based conjugate adaptive optics using oblique back illumination

Area of Science:

• Microscopy
• Optics
• Biophysics

Background:

• Thick, scattering media in microscopy cause aberrations, limiting imaging depth and resolution.
• Traditional adaptive optics (AO) methods often require guide stars or are complex for scattering samples.
• Conjugate AO is effective when aberrations originate from a single plane, like the sample surface.

Purpose of the Study:

• To develop and implement a novel wavefront sensor strategy for AO in microscopy.
• To enable dynamic wavefront correction in thick, scattering biological samples.
• To apply conjugate AO to widefield fluorescence microscopy.

Main Methods:

• Utilizing multiple scattering for oblique back illumination of the wavefront sensor focal plane.
• Measuring flux-density tilt angles caused by aberrations directly.
• Implementing a closed-loop system for dynamic wavefront correction.
• Applying conjugate AO to widefield fluorescence microscopy.

Main Results:

• Demonstrated a wavefront sensor strategy effective in thick, scattering media.
• Achieved dynamic wavefront correction in a closed-loop system.
• Successfully applied conjugate AO to widefield fluorescence microscopy for the first time.
• The sensor provides a large field of view and does not require a guide star.

Conclusions:

• The developed wavefront sensor strategy is a significant advancement for AO in microscopy.
• This method allows for improved imaging through scattering media, enhancing biological research.
• The successful application to widefield fluorescence microscopy opens new possibilities for in-situ imaging.