Ultrafast, large-field multiphoton microscopy based on an acousto-optic deflector and a spatial light modulator

Area of Science:

• Biophotonics
• Microscopy
• Neuroscience

Background:

• Multiphoton microscopy offers deep tissue penetration and reduced phototoxicity.
• High-resolution imaging of large biological samples remains challenging.
• Current scanning methods can limit speed and field of view.

Purpose of the Study:

• To develop an ultrafast, large-field multiphoton fluorescence microscope.
• To achieve high lateral and axial resolutions.
• To enable dynamic observation of biological events in vivo.

Main Methods:

• Utilized a two-dimensional (2-D) acousto-optical deflector (AOD) scanner.
• Employed a spatial light modulator (SLM) for multifocus beam shaping.
• Integrated a mode-locked titanium:sapphire laser and a 60× objective lens.

Main Results:

• Achieved a 136 μm × 136 μm field of view without mechanical scanning.
• Demonstrated high lateral and axial resolutions.
• Successfully imaged a neuronal network, capturing dynamic biological events.

Conclusions:

• The developed microscopy system provides ultrafast, large-field imaging with high resolution.
• This technology facilitates the observation of dynamic biological processes.
• The system shows significant potential for neuroscience and other biological research.