Simultaneous multi-color optical sectioning fluorescence microscopy with wavelength-coded volume holographic gratings

Area of Science:

• Biomedical Optics
• Microscopy
• Holography

Background:

• Optical sectioning fluorescence microscopy is crucial for high-contrast volumetric imaging in biology.
• Simultaneous multi-color imaging is often hindered by bulky, wavelength-specific, and costly optical components.

Purpose of the Study:

• To develop a cost-effective optical sectioning fluorescence microscopy technique for simultaneous multi-color imaging.
• To enhance out-of-focus background rejection in fluorescence microscopy.

Main Methods:

• Implementation of wavelength-coded volume holographic gratings (WC-VHGs) for multiplexed, single-shot multi-wavelength image acquisition.
• Utilizing speckle illumination and HiLo imaging for optical sectioning.
• Lateral separation of multi-wavelength images onto a CCD camera.

Main Results:

• Demonstrated simultaneous dual-wavelength fluorescence imaging using WC-VHGs.
• Successfully imaged standard fluorescent microspheres and ex vivo mT/mG mice cardiac tissue.
• Achieved fine out-of-focus background rejection.

Conclusions:

• WC-VHGs provide a cost-effective and efficient solution for simultaneous multi-color optical sectioning fluorescence microscopy.
• The developed system shows promise for applications in hyperspectral imaging for biomedical research.