Fast and Artifact-Free Excitation Multiplexing Using Synchronized Image Scanning

Area of Science:

• Life sciences
• Materials sciences
• Microscopy

Background:

• Multicolor fluorescence microscopy is vital for visualizing structures and dynamics.
• Sequential acquisition of different excitation wavelengths causes artifacts.

Purpose of the Study:

• To develop a method for quasi-simultaneous multicolor fluorescence imaging.
• To mitigate artifacts caused by temporal aliasing in conventional imaging.

Main Methods:

• Utilizing an optical element to rapidly displace the sample image on the sensor.
• Synchronizing image displacement with illumination at multiple wavelengths.
• Encoding emissions into the point-spread function or distinct images.

Main Results:

• Demonstrated quasi-simultaneous imaging with multiple excitation wavelengths.
• Successfully uncovered hidden emissive states in single quantum dots.
• Applied the system for imaging calcium signaling in neurons.

Conclusions:

• The developed strategy provides a simple yet effective approach for artifact-free multicolor fluorescence imaging.
• This technique enhances the visualization of dynamic processes in life and material sciences.