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Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

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Published on: March 2, 2011

Design of a multi-modality DMD-based two-photon microscope system.

Dihan Chen, Mindan Ren, Dapeng Zhang

|October 29, 2020

Summary

This summary is machine-generated.

We developed a versatile two-photon excitation (TPE) microscope using a digital micromirror device (DMD) for advanced imaging and optical stimulation. This system enables real-time multi-layer imaging, wavefront correction, and rapid multi-focus stimulation for biological research.

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Area of Science:

Biophotonics
Microscopy
Neuroscience

Background:

Advanced microscopy techniques are crucial for high-resolution biological imaging.
Two-photon excitation (TPE) microscopy offers deep tissue penetration and reduced phototoxicity.
Integrating novel components can enhance TPE capabilities for complex biological questions.

Purpose of the Study:

To present the modular design and characterization of a novel multi-modality video-rate TPE microscope.
To integrate a digital micromirror device (DMD) with galvanometric scanners for enhanced functionalities.
To demonstrate real-time imaging and optical stimulation capabilities for biological applications.

Main Methods:

Modular design integrating a digital micromirror device (DMD) and galvanometric scanners.
Development of ultrafast beam shaping and random-access scanning using DMD.
Implementation of multi-layer imaging, DMD-based wavefront correction, and multi-focus optical stimulation.
System automation through detailed optomechanical design and software development.

Main Results:

Achieved multi-layer imaging with 3D programmable imaging planes in real-time.
Demonstrated DMD-based wavefront correction for improved imaging resolution and depth.
Reported multi-focus optical stimulation (up to 22.7 kHz) simultaneous with TPE imaging.
Verified performance through imaging experiments on Drosophila brain, mouse kidney, and human stem cells.

Conclusions:

The developed multi-modality TPE microscope offers significant advancements in imaging and stimulation.
DMD-based adaptive optics improved imaging resolution and depth.
Fast multi-focus stimulation capability was demonstrated for the first time.
The system holds potential for optogenetics and other neuroscience and biophotonics applications.